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has-vivid-red-color\">\u5b9e\u4f53\u96c6<\/mark><\/strong>\uff1a\u540c\u4e00\u7c7b\u578b\u5b9e\u4f53\u7684\u96c6\u5408\u79f0\u4e3a\u5b9e\u4f53\u96c6<\/li>\n\n\n\n<li><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u8054\u7cfb<\/mark><\/strong>\uff1a\u5b9e\u4f53\uff08\u578b\uff09\u5185\u90e8\u7684\u8054\u7cfb\u548c\u5b9e\u4f53\uff08\u578b\uff09\u4e4b\u95f4\u7684\u8054\u7cfb\uff08\u5b9e\u4f53\u5185\u90e8\u7684\u8054\u7cfb\u901a\u5e38\u662f\u6307\u7ec4\u6210\u5b9e\u4f53\u7684\u5404\u5c5e\u6027\u4e4b\u95f4\u7684\u8054\u7cfb\uff0c\u5b9e\u4f53\u4e4b\u95f4\u7684\u8054\u7cfb\u901a\u5e38\u662f\u6307\u4e0d\u540c\u5b9e\u4f53\u96c6\u4e4b\u95f4\u7684\u8054\u7cfb\uff09<\/li>\n<\/ul>\n\n\n\n<p>\u5b9e\u4f53\u4e4b\u95f4\u7684\u8054\u7cfb\u6709<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4e00\u5bf9\u4e00<\/mark><\/strong>\u3001<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4e00\u5bf9\u591a<\/mark><\/strong>\u3001<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u591a\u5bf9\u591a<\/mark><\/strong>\u7b49\u591a\u79cd\u7c7b\u578b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6570\u636e\u6a21\u578b\u7684\u4e09\u8981\u7d20<\/h3>\n\n\n\n<p>\u6570\u636e\u6a21\u578b\u901a\u5e38\u7531\u6570\u636e\u7ed3\u6784\u3001\u6570\u636e\u64cd\u7eb5\u548c\u5b8c\u6574\u6027\u7ea6\u675f\u4e09\u8981\u7d20\u7ec4\u6210\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u6570\u636e\u7ed3\u6784<\/mark>\uff1a\u63cf\u8ff0\u6570\u636e\u5e93\u7684\u7ec4\u6210\u5bf9\u8c61\u4ee5\u53ca\u5bf9\u8c61\u4e4b\u95f4\u7684\u8054\u7cfb\u3002<\/li>\n\n\n\n<li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u6570\u636e\u64cd\u7eb5<\/mark>\uff1a\u5bf9\u6570\u636e\u5e93\u4e2d\u5404\u79cd\u5bf9\u8c61\uff08\u578b\uff09\u7684\u5b9e\u4f8b\uff08\u503c\uff09\u5141\u8bb8\u6267\u884c\u7684\u64cd\u4f5c\u7684\u96c6\u5408\uff0c\u5305\u62ec\u64cd\u4f5c\u53ca\u6709\u5173\u7684\u64cd\u4f5c\u89c4\u5219\u3002<\/li>\n\n\n\n<li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u5b8c\u6574\u7ea6\u675f\u6027<\/mark>\uff1a\u4e00\u7ec4\u5b8c\u6574\u6027\u89c4\u5219\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u6570\u636e\u6a21\u578b\u53ef\u4ee5\u5206\u4e3a\uff1a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u5c42\u6b21\u6a21\u578b<\/mark><\/strong>(\u6811\u72b6\u7ed3\u6784)\u3001<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u7f51\u72b6\u6a21\u578b<\/mark><\/strong>\u3001<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u5173\u7cfb\u6a21\u578b<\/mark><\/strong>\u7b49\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5c42\u6b21\u6a21\u578b<\/strong>\u50cf<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4e00\u9897\u5012\u7acb\u7684\u6811<\/mark><\/li>\n\n\n\n<li><strong>\u7f51\u72b6\u6a21\u578b<\/strong>\u662f<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u7f51\u72b6\u7ed3\u6784<\/mark><\/li>\n\n\n\n<li><strong>\u5173\u7cfb\u6a21\u578b<\/strong>\u662f<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4e00\u5f20\u4e8c\u7ef4\u8868<\/mark><\/li>\n<\/ul>\n\n\n\n<p>\u5c42\u6b21\u6a21\u578b<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u7b80\u5355<\/mark><\/strong>\u4f46<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4e0d\u80fd\u89e3\u51b3\u591a\u5bf9\u591a\u7684\u5173\u7cfb<\/mark><\/strong>\u3002<\/p>\n\n\n\n<p>\u5c42\u6b21\u6a21\u578b\u7684\u6570\u636e\u64cd\u7eb5\u4e3b\u8981\u6709<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u67e5\u8be2<\/mark><\/strong>\u3001<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><strong>\u63d2\u5165<\/strong><\/mark>\u3001<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u5220\u9664<\/mark><\/strong>\u548c<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><strong>\u66f4\u65b0<\/strong><\/mark>\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>\u5c42\u6b21\u6a21\u578b\u7684\u4f18\u7f3a\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uff08\u4f18\u70b9\uff09\u5c42\u6b21\u6a21\u578b\u7684\u6570\u636e\u7ed3\u6784\u6bd4\u8f83<strong>\u7b80\u5355\u6e05\u6670<\/strong><\/li>\n\n\n\n<li>\uff08\u4f18\u70b9\uff09\u5c42\u6b21\u6570\u636e\u5e93\u7684<strong>\u67e5\u8be2\u6548\u7387\u9ad8<\/strong><\/li>\n\n\n\n<li>\uff08\u4f18\u70b9\uff09\u5c42\u6b21\u6570\u636e\u6a21\u578b\u63d0\u4f9b\u4e86<strong>\u826f\u597d\u7684\u5b8c\u6574\u6027\u7ea6\u675f\u652f\u6301<\/strong><\/li>\n\n\n\n<li>\uff08\u7f3a\u70b9\uff09\u73b0\u5b9e\u4e16\u754c\u4e2d<strong>\u5f88\u591a\u8054\u7cfb\u662f\u975e\u5c42\u6b21\u6027<\/strong>\u7684<\/li>\n\n\n\n<li>\uff08\u7f3a\u70b9\uff09\u5982\u679c\u4e00\u4e2a\u7ed3\u70b9\u5177\u6709<strong>\u591a\u4e2a\u53cc\u4eb2\u7ed3\u70b9<\/strong>\uff0c\u7528\u5c42\u6b21\u6a21\u578b\u8868\u793a\u8fd9\u7c7b\u8054\u7cfb\u5c31\u5f88<strong>\u7b28\u62d9<\/strong><\/li>\n\n\n\n<li>\uff08\u7f3a\u70b9\uff09<strong>\u67e5\u8be2\u5b50\u5973\u7ed3\u70b9\u5fc5\u987b\u901a\u8fc7\u53cc\u4eb2\u7ed3\u70b9<\/strong><\/li>\n\n\n\n<li>\uff08\u7f3a\u70b9\uff09\u7531\u4e8e<strong>\u7ed3\u6784\u4e25\u5bc6<\/strong>\uff0c<strong>\u5c42\u6b21\u547d\u4ee4\u8d8b\u4e8e\u7a0b\u5e8f\u5316<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u603b\u4e4b\uff0c\u7528\u5c42\u6b21\u6a21\u578b\u5bf9\u5177\u6709<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4e00\u5bf9\u591a<\/mark><\/strong>\u5c42\u6b21\u8054\u7cfb\u7684\u90e8\u95e8\u63cf\u8ff0\u975e\u5e38\u81ea\u7136\u3001\u76f4\u89c2\uff0c\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7f51\u72b6\u6a21\u578b<\/h3>\n\n\n\n<p>\u7f51\u72b6\u6570\u636e\u5e93\u7cfb\u7edf\u91c7\u7528<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u7f51\u72b6\u6a21\u578b<\/mark><\/strong>\u4f5c\u4e3a\u6570\u636e\u7684\u7ec4\u7ec7\u65b9\u5f0f\uff0c\u5176\u5178\u578b\u4ee3\u8868\u662f<strong>DBTG<\/strong>\u7cfb\u7edf\uff0c\u4ea6\u79f0<strong>CODASYL<\/strong>\u7cfb\u7edf\u3002<\/p>\n\n\n\n<p>\u628a\u6ee1\u8db3\u4e00\u4e0b\u4e24\u4e2a\u6761\u4ef6\u7684\u57fa\u672c\u5c42\u6b21\u8054\u7cfb\u96c6\u5408\u79f0\u4e3a<strong>\u7f51\u72b6\u6a21\u578b<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5141\u8bb8\u4e00\u4e2a\u4ee5\u4e0a\u7684\u7ed3\u70b9\u65e0\u53cc\u4eb2\u7ed3\u70b9<\/li>\n\n\n\n<li>\u4e00\u4e2a\u7ed3\u70b9\u53ef\u4ee5\u6709\u591a\u4e8e\u4e00\u4e2a\u7684\u53cc\u4eb2\u7ed3\u70b9<\/li>\n<\/ul>\n\n\n\n<p>\u7f51\u72b6\u6a21\u578b\u6bd4\u5c42\u6b21\u6a21\u578b\u66f4\u5177\u6709<strong>\u666e\u904d\u6027<\/strong>\uff0c\u5b83\u53bb\u6389\u4e86\u5c42\u6b21\u6a21\u578b\u7684\u4e24\u4e2a\u9650\u5236\uff0c<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u5141\u8bb8\u591a\u4e2a\u7ed3\u70b9\u6ca1\u6709\u53cc\u4eb2\u7ed3\u70b9<\/mark>\uff0c\u4e14<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u5141\u8bb8\u7ed3\u70b9\u6709\u591a\u4e2a\u53cc\u4eb2\u7ed3\u70b9<\/mark>\u3002<\/p>\n\n\n\n<p>\u7f51\u72b6\u6a21\u578b\u7684\u4f18\u7f3a\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uff08\u4f18\u70b9\uff09\u80fd\u591f\u66f4\u4e3a\u76f4\u63a5\u5730\u63cf\u8ff0\u73b0\u5b9e\u4e16\u754c<\/li>\n\n\n\n<li>\uff08\u4f18\u70b9\uff09\u5177\u6709\u826f\u597d\u7684\u6027\u80fd\uff0c\u5b58\u53d6\u6548\u7387\u8f83\u9ad8<\/li>\n\n\n\n<li>\uff08\u7f3a\u70b9\uff09\u7ed3\u6784\u6bd4\u8f83\u590d\u6742<\/li>\n\n\n\n<li>\uff08\u7f3a\u70b9\uff09\u6570\u636e\u5b9a\u4e49\u8bed\u8a00\u548c\u6570\u636e\u64cd\u573a\u8bed\u8a00\u6bd4\u8f83\u590d\u6742<\/li>\n\n\n\n<li>\uff08\u7f3a\u70b9\uff09\u7528\u6237\u5fc5\u987b\u4e86\u89e3\u7cfb\u7edf\u7ed3\u6784\u7684\u7ec6\u8282\uff0c\u52a0\u91cd\u4e86\u7f16\u5199\u5e94\u7528\u7a0b\u5e8f\u7684\u8d1f\u62c5<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5173\u7cfb\u6a21\u578b<\/h3>\n\n\n\n<p>\u5173\u7cfb\u6a21\u578b\u662f\u6700\u91cd\u8981\u7684\u4e00\u79cd\u6570\u636e\u6a21\u578b\u3002<\/p>\n\n\n\n<p>\u5173\u7cfb\u6a21\u578b\u4e2d\u7684\u4e00\u4e9b\u672f\u8bed\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5173\u7cfb<\/strong>\uff1a\u5bf9\u5e94\u901a\u5e38\u8bf4\u7684\u4e00\u5f20\u4e8c\u7ef4\u8868<\/li>\n\n\n\n<li><strong>\u5143\u7956<\/strong>\uff1a\u8868\u4e2d\u7684\u4e00\u884c<\/li>\n\n\n\n<li><strong>\u5c5e\u6027<\/strong>\uff1a\u8868\u4e2d\u7684\u4e00\u5217<\/li>\n\n\n\n<li><strong>\u7801<\/strong>\uff1a\u53c8\u79f0\u7801\u952e\u6216\u952e\uff0c\u662f\u8868\u4e2d\u67d0\u4e00\u4e2a\u5c5e\u6027\u6216\u4e00\u7ec4\u5c5e\u6027<\/li>\n\n\n\n<li><strong>\u57df\uff1a<\/strong>\u8868\u793a\u67d0\u4e00\u5c5e\u6027\u7684\u53d6\u503c\u8303\u56f4<\/li>\n\n\n\n<li><strong>\u5206\u91cf<\/strong>\uff1a\u5143\u7956\u4e2d\u7684\u4e00\u4e2a\u5c5e\u6027\u503c<\/li>\n\n\n\n<li><strong>\u5173\u7cfb\u6a21\u5f0f<\/strong>\uff1a\u5bf9\u5173\u7cfb\u7684\u63cf\u8ff0<\/li>\n<\/ul>\n\n\n\n<p>\u5173\u7cfb\u6a21\u578b\u8981\u6c42\u5173\u7cfb\u5fc5\u987b\u662f<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u89c4\u8303\u5316<\/mark><\/strong>\u7684\u3002\u5173\u7cfb\u7684\u6bcf\u4e00\u4e2a<strong>\u5206\u91cf<\/strong>\u5fc5\u987b\u662f\u4e00\u4e2a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4e0d\u53ef\u5206\u7684\u6570\u636e\u9879<\/mark><\/strong>\u3002<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4e0d\u5141\u8bb8\u8868\u4e2d\u8fd8\u6709\u8868\u3002<\/mark><\/strong><\/p>\n\n\n\n<p>\u5173\u7cfb\u6a21\u578b\u7684\u6570\u636e\u64cd\u7eb5\u4e3b\u8981\u5305\u62ec<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u67e5\u8be2\u3001\u63d2\u5165\u3001\u5220\u9664\u548c\u66f4\u65b0\u6570\u636e<\/mark>\u3002<\/p>\n\n\n\n<p>\u5173\u7cfb\u7684\u5b8c\u6574\u6027\u7ea6\u675f\u5305\u62ec<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><strong>\u5b9e\u4f53\u5b8c\u6574\u6027<\/strong><\/mark>\u3001<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u53c2\u7167\u5b8c\u6574\u6027<\/mark><\/strong>\u548c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u7528\u6237\u5b9a\u4e49\u7684\u5b8c\u6574\u6027<\/mark><\/strong>\u4e09\u5927\u7c7b\u3002<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u5b9e\u4f53\u5b8c\u6574\u6027\uff1a\u4e3b\u7801\u4e0d\u80fd\u4e3a\u7a7a<\/mark><\/strong><\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u53c2\u7167\u5b8c\u6574\u6027\uff1a\u5916\u7801\u8981\u4e48\u53d6\u7a7a\u503c\uff0c\u8981\u4e48\u4e0e\u4e3b\u7801\u5b8c\u5168\u76f8\u540c<\/mark><\/strong><\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><strong>\u7528\u6237\u5b9a\u4e49\u7684\u5b8c\u6574\u6027\uff1a\u6839\u636e\u5177\u4f53\u4e1a\u52a1\u9700\u6c42\uff0c\u8bbe\u7f6e\u7684\u4e00\u4e9b\u9650\u5236\u6761\u4ef6\uff0c\u7528\u6765\u7ea6\u675f\u8868\u4e2d\u5217\u7684\u503c\u7b26\u5408\u7279\u5b9a\u89c4\u5219\u3002\uff08\u6bd4\u5982\u901a\u5e38\u4f7f\u7528\u7684<code>CHECK<\/code>\u6216\u8005<code>DEFAULT<\/code>\uff09<\/strong><\/mark><\/p>\n\n\n\n<p>\u5173\u7cfb\u6a21\u578b\u7684\u4f18\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5173\u7cfb\u6a21\u578b\u5efa\u7acb\u5728\u4e25\u683c\u7684\u6570\u5b66\u6982\u5ff5\u57fa\u7840\u4e0a\u3002<\/li>\n\n\n\n<li>\u5173\u7cfb\u6a21\u578b\u7684\u6982\u5ff5\u5355\u4e00\u3002<\/li>\n\n\n\n<li>\u5173\u7cfb\u6a21\u578b\u7684\u5b58\u53d6\u8def\u5f84\u5bf9\u7528\u6237\u9690\u853d\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u6570\u636e\u5e93\u7684\u4e09\u7ea7\u6a21\u5f0f\u7ed3\u6784<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6a21\u5f0f\uff08\u903b\u8f91\u6a21\u5f0f\uff09\uff1a<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u662f\u6570\u636e\u5e93\u4e2d\u5168\u4f53\u6570\u636e\u7684\u903b\u8f91\u7ed3\u6784\u548c\u7279\u5f81\u7684\u63cf\u8ff0\uff0c\u662f\u6240\u6709\u7528\u6237\u7684\u516c\u5171\u6570\u636e\u89c6\u56fe\u3002<\/mark><\/li>\n\n\n\n<li>\u5916\u6a21\u5f0f\uff08\u5b50\u6a21\u5f0f\u6216\u7528\u6237\u6a21\u5f0f\uff09\uff1a<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u662f\u6570\u636e\u5e93\u7528\u6237\u80fd\u591f\u770b\u89c1\u548c\u4f7f\u7528\u7684\u5c40\u90e8\u6570\u636e\u7684\u903b\u8f91\u7ed3\u6784\u548c\u7279\u5f81\u7684\u63cf\u8ff0\uff0c\u662f\u6570\u636e\u5e93\uff0c\u662f\u6570\u636e\u5e93\u7528\u6237\u7684\u6570\u636e\u89c6\u56fe\uff0c\u662f\u4e0e\u67d0\u4e00\u5e94\u7528\u6709\u5173\u7684\u6570\u636e\u7684\u903b\u8f91\u8868\u793a\u3002<\/mark><\/li>\n\n\n\n<li>\u5185\u6a21\u5f0f\uff08\u7269\u7406\u6a21\u5f0f\u6216\u5b58\u50a8\u6a21\u5f0f\uff09\uff1a<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u662f\u6570\u636e\u7269\u7406\u7ed3\u6784\u7684\u5b58\u50a8\u65b9\u5f0f\u7684\u63cf\u8ff0\uff0c\u662f\u6570\u636e\u5728\u6570\u636e\u5e93\u5185\u90e8\u7684\u7ec4\u7ec7\u65b9\u5f0f\u3002<\/mark><\/li>\n<\/ul>\n\n\n\n<p>&#8211; \u5916\u6a21\u5f0f\u548c\u5185\u6a21\u5f0f\u7684\u5173\u7cfb\uff1a<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><strong>\u4e00\u5bf9\u591a<\/strong><\/mark><\/p>\n\n\n\n<p>&#8211; \u5185\u6a21\u5f0f\u548c\u6a21\u5f0f\u7684\u5173\u7cfb\uff1a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4e00\u5bf9\u4e00<\/mark><\/strong><\/p>\n\n\n\n<p>&#8211; \u6a21\u5f0f\u548c\u5916\u6a21\u5f0f\u7684\u5173\u7cfb\uff1a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4e00\u5bf9\u591a<\/mark><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5173\u7cfb\u64cd\u4f5c<\/h2>\n\n\n\n<p>\u5173\u7cfb\u6a21\u578b\u4e2d\u5e38\u7528\u7684\u5173\u7cfb\u64cd\u4f5c\u5305\u62ec<strong>\u67e5\u8be2\u64cd\u4f5c<\/strong>\u548c<strong>\u66f4\u65b0\u64cd\u4f5c<\/strong>\u4e24\u5927\u90e8\u5206\u3002\u800c\u66f4\u65b0\u64cd\u4f5c\u53c8\u53ef\u5206\u4e3a<strong>\u63d2\u5165<\/strong>\u3001<strong>\u5220\u9664<\/strong>\u3001<strong>\u4fee\u6539<\/strong>\u7b49\u3002<\/p>\n\n\n\n<p>\u5173\u7cfb\u7684\u7c7b\u578b\u6709\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u57fa\u672c\u5173\u7cfb\uff08\u57fa\u672c\u8868\u6216\u57fa\u8868\uff09<\/li>\n\n\n\n<li>\u67e5\u8be2\u8868<\/li>\n\n\n\n<li>\u89c6\u56fe\u8868<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u5173\u7cfb\u7684\u5b8c\u6574\u6027<\/h2>\n\n\n\n<p>\u5173\u7cfb\u6a21\u578b\u4e2d\u6709\u4e09\u7c7b\u5b8c\u6574\u6027\u7ea6\u675f\uff1a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u5b9e\u4f53\u5b8c\u6574\u6027<\/mark><\/strong>\u3001<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u53c2\u7167\u5b8c\u6574\u6027<\/mark><\/strong>\u548c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u7528\u6237\u5b9a\u4e49\u7684\u5b8c\u6574\u6027<\/mark><\/strong>\u3002<\/p>\n\n\n\n<p>\u5b9e\u4f53\u5b8c\u6574\u6027\u7ea6\u675f\uff1a\u82e5\u5c5e\u6027A\u662f\u57fa\u672c\u5173\u7cfbR\u7684\u4e3b\u5c5e\u6027\uff0c\u5219<strong>\u4e0d\u80fd\u53d6\u7a7a\u503c<\/strong>\u3002<\/p>\n\n\n\n<p>\u4e13\u95e8\u7684\u5173\u7cfb\u8fd0\u7b97\u5305\u62ec\u9009\u62e9\u3001\u6295\u5f71\u3001\u8fde\u63a5\u3001\u9664\u7b49\u8fd0\u7b97\u3002<\/p>\n\n\n\n<p>\u5404\u79cd\u8fd0\u7b97\u53ef\u4ee5\u8bb0\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5e76\uff1aR \u222a S<\/li>\n\n\n\n<li>\u5dee\uff1aR &#8211; S<\/li>\n\n\n\n<li>\u4ea4\uff1aR \u2229 S<\/li>\n\n\n\n<li>\u7b1b\u5361\u5c14\u79ef\uff1aR x S<\/li>\n\n\n\n<li>\u9009\u62e9\uff1a\u03c3<sub>F<\/sub>\uff08R\uff09<\/li>\n\n\n\n<li>\u6295\u5f71\uff1a\u03a0<sub>A<\/sub>\uff08R\uff09<\/li>\n\n\n\n<li>\u8fde\u63a5\uff1aR \u22c8 S<\/li>\n\n\n\n<li>\u9664\uff1aR \u00f7 S<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u5173\u7cfb\u6570\u636e\u5e93<\/h2>\n\n\n\n<p>\u5173\u7cfb\u6570\u636e\u5e93\u5fc5\u987b\u6ee1\u8db3\u7684\u6700\u4f4e\u8981\u6c42\u662f<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u6570\u636e\u8868\u7684\u6bcf\u4e00\u4e2a\u5206\u91cf\u5fc5\u987b\u662f\u4e0d\u53ef\u518d\u5206\u7684\u6570\u636e\u9879<\/mark><\/strong><\/p>\n\n\n\n<p>\u5173\u7cfb\u6570\u636e\u8bed\u8a00\u53ef\u5206\u4e3a\u4e09\u7c7b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5173\u7cfb\u4ee3\u6570\u8bed\u8a00<\/li>\n\n\n\n<li>\u5173\u7cfb\u6f14\u7b97\u8bed\u8a00<\/li>\n\n\n\n<li><strong>\u5177\u6709\u5173\u7cfb\u4ee3\u6570\u548c\u5173\u7cfb\u6f14\u7b97\u53cc\u91cd\u7279\u70b9\u7684\u8bed\u8a00\uff08SQL\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u7ea6\u675f\u9879<\/h2>\n\n\n\n<p>\u80fd\u591f\u901a\u8fc7\u67d0\u4e2a\u5b57\u6bb5\u552f\u4e00\u533a\u5206\u51fa\u4e0d\u540c\u7684\u8bb0\u5f55\uff0c\u8fd9\u4e2a\u5b57\u6bb5\u88ab\u79f0\u4e3a<code>\u4e3b\u952e<\/code>\u3002<\/p>\n\n\n\n<p>\u5916\u952e\u7528\u4e8e\u5efa\u7acb\u8868\u4e0e\u8868\u4e4b\u95f4\u7684\u5173\u8054\u6027\u3002\u5b83\u5f15\u7528\u53e6\u4e00\u5f20\u8868\u7684\u4e3b\u952e\uff0c\u786e\u4fdd\u5916\u952e\u5b57\u6bb5\u7684\u503c\u5fc5\u987b\u5728\u88ab\u5f15\u7528\u8868\u7684\u4e3b\u952e\u4e2d\u5b58\u5728\uff0c\u4ee5\u4fdd\u6301\u6570\u636e\u7684\u5b8c\u6574\u6027\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6570\u636e\u52a0\u5bc6<\/h2>\n\n\n\n<p>\u6570\u636e\u52a0\u5bc6\u4e3b\u8981\u5305\u62ec<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u5b58\u50a8\u52a0\u5bc6<\/mark><\/strong>\u548c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4f20\u8f93\u52a0\u5bc6<\/mark><\/strong>\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6570\u636e\u5e93\u7684\u4e0d\u5b89\u5168\u56e0\u7d20<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u975e\u6388\u6743\u7528\u6237\u5bf9\u6570\u636e\u5e93\u7684\u6076\u610f\u5b58\u53d6\u548c\u7834\u574f<\/li>\n\n\n\n<li>\u6570\u636e\u5e93\u4e2d\u91cd\u8981\u6216\u654f\u611f\u7684\u6570\u636e\u88ab\u6cc4\u9732<\/li>\n\n\n\n<li>\u5b89\u5168\u73af\u5883\u7684\u8106\u5f31\u6027<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">TCSEC\/TDI \u5b89\u5168\u7ea7\u522b\u5212\u5206<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">\u5b89\u5168\u7ea7\u522b<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5b89\u5168\u6307\u6807<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">A1<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u9a8c\u8bc1\u8bbe\u8ba1<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">B3<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5b89\u5168\u57df<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">B2<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u7ed3\u6784\u5316\u4fdd\u62a4<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">B1<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u6807\u8bb0\u5b89\u5168\u4fdd\u62a4<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">C2<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u53d7\u63a7\u7684\u5b58\u53d6\u4fdd\u62a4<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">C1<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u81ea\u4e3b\u5b89\u5168\u4fdd\u62a4<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">D<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u6700\u5c0f\u4fdd\u62a4<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><code>A1<\/code>\u662f<strong>\u6700\u9ad8<\/strong>\u5b89\u5168\u7ea7\u522b\uff0c<code>D<\/code>\u662f<strong>\u6700\u4f4e<\/strong>\u5b89\u5168\u7ea7\u522b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6570\u636e\u4f9d\u8d56<\/h2>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u6570\u636e\u4f9d\u8d56<\/mark><\/strong>\uff1a<strong>\u51fd\u6570\u4f9d\u8d56<\/strong>\u548c<strong>\u591a\u503c\u4f9d\u8d56<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8303\u5f0f<\/h2>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><strong>\u7b2c\u4e00\u8303\u5f0f\uff081NF\uff09<\/strong><\/mark>\uff1a<strong>\u6bcf\u4e00\u4e2a\u5206\u91cf\u5fc5\u987b\u662f\u4e0d\u53ef\u5206\u7684\u6570\u636e\u9879\u3002<\/strong><\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><strong>\u7b2c\u4e8c\u8303\u5f0f\uff082NF\uff09<\/strong><\/mark>\uff1a<strong>R \u2208 1NF\uff0c\u4e14\u6bcf\u4e00\u4e2a\u975e\u4e3b\u5c5e\u6027\u5b8c\u5168\u51fd\u6570\u4f9d\u8d56\u4e8e\u4efb\u4f55\u4e00\u4e2a\u5019\u9009\u9879\u3002<\/strong><\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><strong>\u7b2c\u4e09\u8303\u5f0f\uff083NF\uff09<\/strong><\/mark>\uff1a<strong>\u6bcf\u4e00\u4e2a\u975e\u4e3b\u5c5e\u6027\u65e2\u4e0d\u4f20\u9012\u4f9d\u8d56\u7801\uff0c\u4e5f\u4e0d\u90e8\u5206\u4f9d\u8d56\u4e8e\u7801\u3002<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6570\u636e\u5e93\u8bbe\u8ba1<\/h2>\n\n\n\n<p>\u6570\u636e\u5e93\u8bbe\u8ba1\u662f\u6307\u5bf9\u4e8e\u4e00\u4e2a\u7ed9\u5b9a\u7684\u5e94\u7528\u73af\u5883\uff0c\u7ed3\u6784\u4f18\u5316\u7684\u6570\u636e\u5e93\u903b\u8f91\u6a21\u5f0f\u548c\u7269\u7406\u7ed3\u6784\uff0c\u5e76\u636e\u6b64\u5efa\u7acb\u6570\u636e\u5e93\u53ca\u5176\u5e94\u7528\u7cfb\u7edf\uff0c\u4f7f\u4e4b\u80fd\u591f\u6709\u6548\u5730\u5b58\u50a8\u548c\u7ba1\u7406\u6570\u636e\uff0c\u6ee1\u8db3\u5404\u79cd\u7528\u6237\u7684\u5e94\u7528\u9700\u6c42\uff0c\u5305\u62ec\u4fe1\u606f\u7ba1\u7406\u8981\u6c42\u548c\u6570\u636e\u64cd\u4f5c\u8981\u6c42\u3002<\/p>\n\n\n\n<p><strong>\u7279\u70b9<\/strong>\uff1a<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4e09\u5206\u6280\u672f<\/mark><\/strong>\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4e03\u5206\u7ba1\u7406<\/mark><\/strong>\uff0c<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u5341\u4e8c\u5206\u57fa\u7840\u6570\u636e<\/mark><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6570\u636e\u5e93\u8bbe\u8ba1\u7684\u57fa\u672c\u6b65\u9aa4<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u9700\u6c42\u5206\u6790\u9636\u6bb5<\/li>\n\n\n\n<li>\u6982\u5ff5\u7ed3\u6784\u8bbe\u8ba1\u9636\u6bb5<\/li>\n\n\n\n<li>\u903b\u8f91\u7ed3\u6784\u8bbe\u8ba1\u9636\u6bb5<\/li>\n\n\n\n<li>\u7269\u7406\u7ed3\u6784\u8bbe\u8ba1\u9636\u6bb5<\/li>\n\n\n\n<li>\u6570\u636e\u5e93\u5b9e\u65bd\u9636\u6bb5<\/li>\n\n\n\n<li>\u6570\u636e\u5e93\u8fd0\u884c\u548c\u7ef4\u62a4\u9636\u6bb5<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u6570\u636e\u5b57\u5178<\/h2>\n\n\n\n<p>\u6570\u636e\u5b57\u5178\u662f\u8fdb\u884c\u8be6\u7ec6\u7684\u6570\u636e\u6536\u96c6\u548c\u6570\u636e\u5206\u6790\u6240\u83b7\u5f97\u7684\u4e3b\u8981\u6210\u679c\u3002\u5b83\u662f\u5173\u4e8e\u6570\u636e\u5e93\u4e2d\u6570\u636e\u7684\u63cf\u8ff0\uff0c\u5373<strong>\u5143\u6570\u636e<\/strong>\uff0c<em>\u800c\u4e0d\u662f\u6570\u636e\u672c\u8eab<\/em>\u3002<strong>\u6570\u636e\u5b57\u5178\u662f\u5728\u9700\u6c42\u5206\u6790\u9636\u6bb5\u5efa\u7acb<\/strong>\uff0c<strong>\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u8fc7\u7a0b\u4e2d\u4e0d\u65ad\u4fee\u6539\u3001\u5145\u5b9e\u3001\u5b8c\u5584\u7684<\/strong>\u3002\u5b83\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\u5360\u6709\u91cd\u8981\u7684\u5730\u4f4d\u3002<\/p>\n\n\n\n<p>\u6570\u636e\u5b57\u5178\u901a\u5e38\u5305\u62ec\uff1a<strong>\u6570\u636e\u9879<\/strong>\u3001<strong>\u6570\u636e\u7ed3\u6784<\/strong>\u3001<strong>\u6570\u636e\u6d41<\/strong>\u3001<strong>\u6570\u636e\u5b58\u50a8<\/strong>\u548c<strong>\u5904\u7406\u8fc7\u7a0b<\/strong>\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ER\u6a21\u578b<\/h2>\n\n\n\n<p>\u6982\u5ff5\u6a21\u578b\u7684\u6709\u529b\u5de5\u5177<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">ER\u6a21\u578b<\/mark><\/strong><\/p>\n\n\n\n<p>E-R\u56fe\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5b9e\u4f53\u578b\u7528\u77e9\u5f62\u8868\u793a<\/strong><\/li>\n\n\n\n<li><strong>\u5c5e\u6027\u7528\u692d\u5706\u8868\u793a<\/strong><\/li>\n\n\n\n<li><strong>\u8054\u7cfb\u7528\u68f1\u5f62\u8868\u793a<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u67e5\u8be2\u5904\u7406<\/h2>\n\n\n\n<p>\u67e5\u8be2\u5904\u7406\u5206\u4e3a4\u4e2a\u6b65\u9aa4\uff1a<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"><strong>\u67e5\u8be2\u5206\u6790<\/strong>\u3001<strong>\u67e5\u8be2\u68c0\u67e5<\/strong>\u3001<strong>\u67e5\u8be2\u4f18\u5316\u548c\u67e5\u8be2\u6267\u884c<\/strong><\/mark><\/p>\n\n\n\n<p>\u67e5\u8be2\u4f18\u5316\u7684\u4f18\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e0d\u4ec5\u5728\u4e8e\u7528\u6237\u4e0d\u5fc5\u8003\u8651\u5982\u4f55\u6700\u597d\u5730\u8868\u8fbe\u67e5\u8be2\u4ee5\u83b7\u5f97\u8f83\u9ad8\u7684\u6548\u7387\uff0c\u800c\u4e14\u5728\u4e8e\u7cfb\u7edf\u53ef\u4ee5\u6bd4\u7528\u6237\u7a0b\u5e8f\u7684\u201c\u4f18\u5316\u201d\u505a\u5f97\u66f4\u597d\u3002<\/li>\n\n\n\n<li>\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\uff1a\u907f\u514d\u7b1b\u5361\u5c14\u79ef\u3001\u9884\u5904\u7406<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">E-R\u56fe<\/h2>\n\n\n\n<p>\u6bcf\u6b21\u671f\u672b\u90fd\u6709\u4e00\u4e2a<a href=\"https:\/\/www.bilibili.com\/video\/BV1tV4y1d7FE\/?vd_source=fa9de75b9e5251495ee15fc767cb5892\">\u58f0\u97f3\u751c\u7f8e\u7684\u5c0f\u59d0\u59d0<\/a>\u6559\u6211\u4e0d\u4f1a\u7684\u753b\u56fe\u9898\u270c\ufe0f\uff0c\u76f4\u63a5\u770b\u89c6\u9891\u53ef\u80fd\u5b66\u7684\u66f4\u5feb\u3002<\/p>\n\n\n\n<p>\u753bE-R\u9996\u5148\u9700\u8981\u77e5\u9053\u5b9e\u4f53\u578b\u3001\u5b9e\u4f53\u7684\u5c5e\u6027\u3001\u5b9e\u4f53\u95f4\u7684\u8054\u7cfb\u5206\u522b\u5e94\u8be5\u600e\u4e48\u53bb\u753b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/WechatIMG229.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"814\" height=\"334\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/WechatIMG229.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2415\"  sizes=\"auto, (max-width: 814px) 100vw, 814px\" \/><\/div><\/figure>\n\n\n\n<p>\u7136\u540e\u8fd9\u91cc\u662f\u5c06\u8fd9\u51e0\u4e2a\u5143\u7d20\u62fc\u8d77\u6765\u7684\u793a\u4f8b\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/WechatIMG230.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"612\" height=\"529\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/WechatIMG230.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2416\" style=\"width:324px;height:auto\"  sizes=\"auto, (max-width: 612px) 100vw, 612px\" \/><\/div><\/figure>\n<\/div>\n\n\n<p>\u591a\u5bf9\u591a\u5173\u7cfb<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4f1a\u5f62\u6210\u65b0\u7684\u8868<\/mark>\uff08\u5373\u4e4b\u95f4\u7684\u8fde\u63a5\u5173\u7cfb\uff09<em>\uff08n : m\uff09<\/em><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u65b0\u7684\u8868\u9700\u589e\u52a0\u4e0a\u5b9e\u4f53\u7684\u4e3b\u7801<\/mark><\/p>\n\n\n\n<p><em><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u5047\u5982\u8bf4n\u4e2a\u8001\u5e08\u6559m\u4e2a\u5b66\u751f\uff0c\u8fd9\u5c31\u662f\u4e00\u4e2a\u591a\u5bf9\u591a\u7684\u5173\u7cfb\uff0c\u6b64\u65f6\u4e2d\u95f4\u201c\u6388\u8bfe\u201d\u7684\u5173\u7cfb\u5c31\u9700\u8981\u65b0\u5f00\u4e00\u4e2a\u8868\u3002<\/mark><\/em><\/p>\n\n\n\n<p>\u4e00\u5bf9\u591a\u5173\u7cfb\u5728\u591a\u7aef\uff08n\u7aef\uff09\u52a0\u4e0a\u8fde\u63a5\u7684\u5c5e\u6027\u548c1\u7aef\u7684\u4e3b\u7801\u3002<em>\uff081 : n\uff09<\/em><\/p>\n\n\n\n<p>\u753bE-R\u56fe\u548c\u5173\u7cfb\u6a21\u578b\u7684\u4f8b\u9898\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/WechatIMG232-750x1024.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"1024\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/WechatIMG232-750x1024.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2423\"  sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/div><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">\u4ee3\u7801\u90e8\u5206<\/h1>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">SQL\u8bed\u8a00\u662f\u975e\u8fc7\u7a0b\u5316\u7684\u6570\u636e\u5e93\u8bed\u8a00\u3002<\/mark><\/p>\n\n\n\n<p>\u4e3b\u8981\u8bb0\u5f55\u4e00\u4e9b\u57fa\u672c\u5e76\u4e14\u5e38\u7528\u7684SQL\u4ee3\u7801\uff0c\u4ee5\u4e0b\u4ee3\u7801\u516c\u5f0f\u4e2d<code>&lt;&gt;<\/code>\u4e2d\u7684\u5185\u5bb9\u662f\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8fdb\u884c\u4fee\u6539\u7684\u3002<\/p>\n\n\n\n<p>Old School\u8001\u5e08\u6559\u6211\u5fc5\u987b\u4e00\u4e2a\u547d\u4ee4\u4ee3\u7801\u5199\u5728\u4e00\u884c\uff0c\u6240\u4ee5\u8fd9\u91cc\u7b2c\u4e00\u6b21\u5199\u7684\u65f6\u5019\u90fd\u662f\u5199\u5728\u4e86\u4e00\u884c\uff0c\u770b\u7684\u65f6\u5019\u53ef\u80fd\u6709\u70b9\u8d39\u529b\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u53ea\u662f\u4e0d\u592a\u8bb0\u5f97\u4e0b\u5217\u516c\u5f0f\u7684\u4e00\u4e9b\u7ec6\u8282\uff0c\u8fd9\u91cc\u5148\u653e\u4e00\u4e2a\u5e38\u7528\u516c\u5f0f\u7684\u5927\u5168\uff0c\u60f3\u770b\u6bcf\u4e2a\u516c\u5f0f\u8be6\u7ec6\u7684\u8bf4\u660e\u53ef\u4ee5\u7ee7\u7eed\u5f80\u4e0b\u9762\u770b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-- \u521b\u5efa\u8868\nCREATE TABLE &lt;\u8868\u540d&gt; (&lt;\u5b57\u6bb51&gt; &lt;\u6570\u636e\u7c7b\u578b&gt; &lt;\u662f\u5426\u4e3aNULL&gt; &lt;\u662f\u5426\u4e3a\u4e3b\u952e&gt;, ...);\n-- \u521b\u5efa\u5173\u8054\u8868\nCREATE TABLE &lt;\u8868\u540d&gt; (&lt;\u5b57\u6bb51&gt; &lt;\u6570\u636e\u7c7b\u578b&gt; PRIMARY KEY, FOREIGN KEY (&lt;\u5f53\u524d\u65b0\u521b\u5efa\u8868\u7684\u4e3b\u952e\u540d&gt;) REFERENCES &lt;\u5173\u8054\u8868\u540d&gt; (&lt;\u8be5\u5173\u8054\u8868\u7684\u4e3b\u952e&gt;),&lt;\u5b57\u6bb52&gt; &lt;\u6570\u636e\u7c7b\u578b&gt; &lt;\u662f\u5426\u4e3aNULL&gt;, \u2026);\n-- \u5220\u9664\u8868\nDROP TABLE &lt;\u8868\u540d&gt;;\n\n-- \u4fee\u6539\u8868\u7684\u82e5\u5e72\u64cd\u4f5c\uff1a\n-- \u6dfb\u52a0\u5217\nALTER TABLE &lt;\u8868\u540d&gt; ADD COLUMN &lt;\u5217\u540d&gt; &lt;\u6570\u636e\u7c7b\u578b&gt; &lt;\u4e3b\u5916\u952e&gt;;\n-- \u4fee\u6539\u5217\nALTER TABLE &lt;\u8868\u540d&gt; MODIFY COLUMN &lt;\u5217\u540d&gt; &lt;\u65b0\u6570\u636e\u7c7b\u578b&gt; &lt;\u4e3b\u5916\u952e&gt;;\n-- \u5220\u9664\u5217\nALTER TABLE &lt;\u8868\u540d&gt; DROP COLUMN &lt;\u5217\u540d&gt;;\n-- \u6dfb\u52a0\u5916\u952e\u6216\u5176\u5b83\u7ea6\u675f\nALTER TABLE &lt;\u88681\u540d&gt; ADD CONSTRAINT &lt;\u5916\u952e\u540d&gt; FOREIGN KEY (&lt;\u5217\u540d&gt;) REFERENCES &lt;\u88682\u540d&gt;(&lt;\u5217\u540d&gt;);\n-- \u63d2\u5165\u6570\u636e\uff08\u589e\uff09\nINSERT INTO &lt;\u8868\u540d&gt; (&lt;\u5b57\u6bb51&gt;, &lt;\u5b57\u6bb52&gt;, \u2026) VALUES (&lt;\u503c1&gt;, &lt;\u503c2&gt;, \u2026);\n-- \u5220\u9664\u6570\u636e\uff08\u5220\uff09\nDELETE FROM &lt;\u8868\u540d&gt; WHERE \u2026;\n\n-- \u67e5\u8be2\u6570\u636e\uff08\u67e5\uff09\uff1a\n-- \u57fa\u672c\u67e5\u8be2\nSELECT * FROM &lt;\u8868\u540d&gt;;\n-- \u6761\u4ef6\u67e5\u8be2\nSELECT * FROM &lt;\u8868\u540d&gt; WHERE &lt;\u6761\u4ef6\u8868\u8fbe\u5f0f&gt;;\n-- \u6a21\u7cca\u6761\u4ef6\u67e5\u8be2\nSELECT * FROM &lt;\u8868\u540d&gt; WHERE &lt;\u5b57\u6bb5&gt; LIKE '\u2026%';\n-- \u6392\u5e8f\u67e5\u8be2\nSELECT &lt;\u5b57\u6bb51&gt;, &lt;\u5b57\u6bb52&gt;, \u2026 FROM &lt;\u8868\u540d&gt; ORDER BY ;\n-- \u96c6\u5408\u67e5\u8be2\nSELECT &lt;\u5217\u540d&gt; FROM &lt;\u8868\u540d&gt; WHERE &lt;\u5217\u540d&gt; IN (&lt;\u503c1&gt;, &lt;\u503c2&gt;, &lt;\u503c3&gt;, \u2026);\n-- \u591a\u8868\u67e5\u8be2\nSELECT &lt;\u82e5\u5e72\u5b57\u6bb5\u540d&gt; FROM &lt;\u8868\u540d1&gt;, &lt;\u8868\u540d2&gt; WHERE &lt;\u6761\u4ef6\u8868\u8fbe\u5f0f&gt;;\n-- \u805a\u5408\u67e5\u8be2\nSELECT &lt;\u805a\u5408\u51fd\u6570&gt;(&lt;\u82e5\u5e72\u5b57\u6bb5&gt;) AS &lt;\u65b0\u7684\u5b57\u6bb5\u540d&gt; FROM &lt;\u8868\u540d&gt;;\n-- \u5d4c\u5957\u67e5\u8be2\nSELECT &lt;\u5217\u540d&gt; FROM &lt;\u8868\u540d&gt; WHERE &lt;\u5217\u540d&gt; &lt;\u8fd0\u7b97\u7b26&gt; (&lt;\u5b50\u67e5\u8be2&gt;);\n-- \u66f4\u65b0\u6570\u636e\uff08\u6539\uff09\nUPDATE &lt;\u8868\u540d&gt; SET \u5b57\u6bb51=\u503c1, \u5b57\u6bb52=\u503c2, \u2026 WHERE \u2026;\n\n-- \u6743\u9650\u76f8\u5173\u547d\u4ee4\uff1a\n-- \u7ed9\u4e88\u6743\u9650\nGRANT &lt;\u6743\u9650\u5217\u8868&gt; ON &lt;\u5bf9\u8c61\u540d&gt; TO &lt;\u7528\u6237\u540d&gt;;\n-- \u89e3\u9664\u6743\u9650\nREVOKE &lt;\u6743\u9650\u5217\u8868&gt; ON &lt;\u5bf9\u8c61\u540d&gt; FROM &lt;\u7528\u6237\u540d&gt;;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u8868\u683c\u64cd\u4f5c<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u521b\u5efa\u8868<\/h3>\n\n\n\n<p>\u53ef\u4ee5\u901a\u8fc7SQL\u4ee3\u7801\u76f4\u63a5\u521b\u5efa\u8868\u683c\uff0c\u505a\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE &lt;\u8868\u540d&gt; (&lt;\u5b57\u6bb51&gt; &lt;\u6570\u636e\u7c7b\u578b&gt; &lt;\u662f\u5426\u4e3aNULL&gt; &lt;\u662f\u5426\u4e3a\u4e3b\u952e&gt;, ...);<\/code><\/pre>\n\n\n\n<p>\u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u67e5\u770b\u672c\u6587\u7ae0\u672b\u5c3e\u7684\u5e38\u89c1\u6570\u636e\u7c7b\u578b\u6c47\u603b\u90e8\u5206\u3002\u82e5\u60f3\u5c06\u8be5\u503c\u8bbe\u4e3a\u4e3b\u952e\uff0c\u53ef\u4ee5\u5728\u6570\u636e\u7c7b\u578b\u540e\u9762\u5199\u4e0a<code>PRIMARY KEY<\/code>\uff0c\u82e5\u4e0d\u662f\u4e3b\u952e\u5219\u53ef\u4ee5\u4e0d\u5199\u3002\u53ef\u4ee5\u4f7f\u7528<code>NOT NULL<\/code>\u6765\u58f0\u660e\u8fd9\u4e2a\u5b57\u6bb5\u4e0b\u7684\u5185\u5bb9\u4e0d\u586b\u5199\u65f6\u5019\u7684\u60c5\u51b5\uff0c\u6bd4\u5982\u8bf4INT\u7c7b\u578b\u7684\u6570\u636e\u4e0b\u9762\uff0c\u5982\u8fc7\u8bbe\u7f6e\u4e0d\u4e3aNULL\uff0c\u5219\u4f1a\u81ea\u52a8\u586b\u4e0a0\u800c\u4e0d\u662fNULL\u3002<\/p>\n\n\n\n<p>\u4e3e\u4f8b\u521b\u5efa\u4e00\u4e2astudent\u8868\uff0c\u8868\u4e2d\u5305\u542b<code>\u5b66\u53f7<\/code>\uff0c<code>\u59d3\u540d<\/code>\uff0c<code>\u6027\u522b<\/code>\u5217\u5185\u5bb9\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE student (\u5b66\u53f7 BIGINT NOT NULL PRIMARY KEY, \u59d3\u540d CHAR(16) NOT NULL, \u6027\u522b CHAR(4) NOT NULL);<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-16.42.02.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"678\" height=\"258\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-16.42.02.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1727\"  sizes=\"auto, (max-width: 678px) 100vw, 678px\" \/><\/div><\/figure>\n\n\n\n<p>\u6b64\u5916\u53ef\u4ee5\u4f7f\u7528<code>CHECK()<\/code>\u8bed\u53e5\u6765\u9650\u5236\u63d2\u5165\u8868\u4e2d\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u9650\u5236\u4e86<code>\u6027\u522b<\/code>\u8fd9\u91cc\u53ea\u80fd\u6dfb<code>\u7537<\/code>\u6216\u8005<code>\u5973<\/code>\uff0c\u5426\u5219\u5c31\u4f1a\u62a5\u9519\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE people (\u5b66\u53f7 INT PRIMARY KEY, \u6027\u522b CHAR(4) CHECK(\u6027\u522b IN ('\u7537', '\u5973')));<\/code><\/pre>\n\n\n\n<p>\u518d\u6bd4\u5982\u4e0b\u9762\u7684\u4ee3\u7801\u8fdb\u4e00\u6b65\u9650\u5236\u4e86<code>\u5b66\u53f7<\/code>\u53ea\u80fd\u662f1\uff5e99\u4e4b\u95f4\u7684\u6570\u5b57\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE people_2 (\u5b66\u53f7 INT PRIMARY KEY CHECK(\u5b66\u53f7 &gt; 0 AND \u5b66\u53f7 &lt; 100), \u6027\u522b CHAR(4) CHECK(\u6027\u522b IN ('\u7537', '\u5973')));<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u5173\u8054\u8868<\/h3>\n\n\n\n<p>\u5728\u4e86\u89e3\u4e86\u4e3b\u952e\u548c\u5916\u952e\u7684\u5b9a\u4e49\u4e4b\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u518d\u521b\u5efa\u4e00\u4e2a\u8868\uff0c\u5229\u7528<code>REFERENCES<\/code>\u5c06\u4e24\u4e2a\u8868\u5173\u8054\u8d77\u6765\uff08<code>FOREIGN KEY (&lt;\u5f53\u524d\u65b0\u521b\u5efa\u8868\u7684\u4e3b\u952e\u540d&gt;) REFERENCES &lt;\u5173\u8054\u8868\u540d&gt; (&lt;\u8be5\u5173\u8054\u8868\u7684\u4e3b\u952e&gt;)<\/code>\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE &lt;\u8868\u540d&gt; (&lt;\u5b57\u6bb51&gt; &lt;\u6570\u636e\u7c7b\u578b&gt; PRIMARY KEY, FOREIGN KEY (&lt;\u5f53\u524d\u65b0\u521b\u5efa\u8868\u7684\u4e3b\u952e\u540d&gt;) REFERENCES &lt;\u5173\u8054\u8868\u540d&gt; (&lt;\u8be5\u5173\u8054\u8868\u7684\u4e3b\u952e&gt;),&lt;\u5b57\u6bb52&gt; &lt;\u6570\u636e\u7c7b\u578b&gt; &lt;\u662f\u5426\u4e3aNULL&gt;, ...);<\/code><\/pre>\n\n\n\n<p>\u5982\u6b64\u6211\u4eec\u4fbf\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5173\u8054\u8868score\uff0c\u5e76\u4e14\u4e24\u4e2a\u8868\u4e2d\u7684<code>\u5b66\u53f7<\/code>\u5b57\u6bb5\u662f\u5171\u4eab\u7684\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE score (\u5b66\u53f7 BIGINT PRIMARY KEY, FOREIGN KEY (\u5b66\u53f7) REFERENCES student (\u5b66\u53f7), \u6570\u636e\u5e93 INT NOT NULL, \u6570\u636e\u7ed3\u6784 INT NOT NULL);<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-19.03.36.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"488\" height=\"148\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-19.03.36.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1762\"  sizes=\"auto, (max-width: 488px) 100vw, 488px\" \/><\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u5220\u9664\u8868<\/h3>\n\n\n\n<p>\u521b\u5efa\u4e86\u8868\u4e4b\u540e\uff0c\u6211\u4eec\u5982\u679c\u4e0d\u60f3\u8981\u8fd9\u4e2a\u8868\u4e86\uff0c\u4fbf\u53ef\u4ee5\u4f7f\u7528<code>DROP<\/code>\u5220\u9664\u8868\uff0c\u5176\u7528\u6cd5\u975e\u5e38\u7b80\u5355\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DROP TABLE &lt;\u8868\u540d&gt;;<\/code><\/pre>\n\n\n\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c<code>DROP<\/code>\u64cd\u4f5c\u4f1a\u76f4\u63a5\u5220\u9664\u8868\uff0c\u4e0d\u53ef\u590d\u539f\uff0c\u6240\u4ee5\u8bf7\u8c28\u614e\u64cd\u4f5c\uff01<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4fee\u6539\u8868<\/h3>\n\n\n\n<p>\u4e00\u4e9b\u7b80\u5355\u7684\u4fee\u6539\u8868\u53ef\u4ee5\u4f7f\u7528<code>ALTER<\/code>\u6765\u5b9e\u73b0\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-- \u6dfb\u52a0\u5217\nALTER TABLE &lt;\u8868\u540d&gt; ADD COLUMN &lt;\u5217\u540d&gt; &lt;\u6570\u636e\u7c7b\u578b&gt; &lt;\u4e3b\u5916\u952e&gt;;\n\n-- \u4fee\u6539\u5217\nALTER TABLE &lt;\u8868\u540d&gt; MODIFY COLUMN &lt;\u5217\u540d&gt; &lt;\u65b0\u6570\u636e\u7c7b\u578b&gt; &lt;\u4e3b\u5916\u952e&gt;;\n\n-- \u5220\u9664\u5217\nALTER TABLE &lt;\u8868\u540d&gt; DROP COLUMN &lt;\u5217\u540d&gt;;\n\n-- \u6dfb\u52a0\u5916\u952e\u6216\u5176\u5b83\u7ea6\u675f\nALTER TABLE &lt;\u88681\u540d&gt; ADD CONSTRAINT &lt;\u5916\u952e\u540d&gt; FOREIGN KEY (&lt;\u5217\u540d&gt;) REFERENCES &lt;\u88682\u540d&gt;(&lt;\u5217\u540d&gt;);<\/code><\/pre>\n\n\n\n<p>\u793a\u4f8b\uff1a\u5728 <code>employees<\/code> \u8868\u4e2d\u65b0\u589e\u4e00\u5217 <code>age<\/code>\uff0c\u6570\u636e\u7c7b\u578b\u4e3a <code>INT<\/code>\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees ADD COLUMN age INT;<\/code><\/pre>\n\n\n\n<p>\u793a\u4f8b\uff1a\u65b0\u589e\u4e00\u4e2a <code>salary<\/code> \u5217\uff0c\u6570\u636e\u7c7b\u578b\u4e3a\u5c0f\u6570\u4e14\u4e0d\u5141\u8bb8\u4e3a\u7a7a\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees ADD COLUMN salary DECIMAL(10,2) NOT NULL;<\/code><\/pre>\n\n\n\n<p>\u793a\u4f8b\uff1a\u5220\u9664 <code>employees<\/code> \u8868\u4e2d\u7684 <code>age<\/code> \u5217\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees DROP COLUMN age;<\/code><\/pre>\n\n\n\n<p>\u793a\u4f8b\uff1a\u5c06 <code>age<\/code> \u5217\u7684\u6570\u636e\u7c7b\u578b\u4fee\u6539\u4e3a <code>TINYINT<\/code>\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees MODIFY COLUMN age TINYINT;<\/code><\/pre>\n\n\n\n<p>\u4fee\u6539\u8868\u7684\u5217\u9664\u4e86\u7ecf\u5e38\u4f1a\u4f7f\u7528<code>MODIFY<\/code>\u5173\u952e\u5b57\uff0c<code>ALTER COLUMN<\/code>\u4e5f\u540c\u6837\u9002\u7528\u4e8e\u4e0a\u9762\u7684\u4fee\u6539\u6570\u636e\u7c7b\u578b\u3002<\/p>\n\n\n\n<p>\u793a\u4f8b\uff1a\u5c06 <code>age<\/code> \u5217\u7684\u6570\u636e\u7c7b\u578b\u4fee\u6539\u4e3a <code>CHAR(10)<\/code>\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees ALTER COLUMN age TYPE CHAR(10);<\/code><\/pre>\n\n\n\n<p>\u9664\u4e86\u4fee\u6539\u7c7b\u578b\uff0c<code>ALTER COLUMN<\/code>\u8fd8\u53ef\u4ee5\u4fee\u6539\u6539\u5217\u7684\u9ed8\u8ba4\u503c\u3002<\/p>\n\n\n\n<p>\u793a\u4f8b\uff1a\u5c06 <code>salary<\/code> \u5217\u7684\u9ed8\u8ba4\u503c\u8bbe\u4e3a 5000\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees ALTER COLUMN salary SET DEFAULT 5000;<\/code><\/pre>\n\n\n\n<p>\u9664\u4e86\u52a0\u5165\u9ed8\u8ba4\u503c\uff0c<code>ALTER TABLE<\/code>\u8fd8\u53ef\u4ee5\u5220\u9664\u9ed8\u8ba4\u503c\u3002<\/p>\n\n\n\n<p>\u793a\u4f8b\uff1a\u79fb\u9664 <code>salary<\/code> \u5217\u7684\u9ed8\u8ba4\u503c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees ALTER COLUMN salary DROP DEFAULT;<\/code><\/pre>\n\n\n\n<p>\u9664\u4e86\u4e0a\u9762\u4e00\u4e9b\u5e38\u7528\u7684\u64cd\u4f5c\u4ee5\u5916\uff0c<code>ALTER TABLE<\/code>\u8fd8\u53ef\u4ee5\u901a\u8fc7<code>RENAME COLUMN<\/code>\u6765\u91cd\u547d\u540d\u5217\u540d\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE &lt;\u8868\u540d&gt; RENAME COLUMN &lt;\u5217\u539f\u540d&gt; TO &lt;\u4fee\u6539\u540e\u7684\u5217\u540d&gt;;<\/code><\/pre>\n\n\n\n<p>\u793a\u4f8b\uff1a\u5c06 <code>age<\/code> \u5217\u91cd\u547d\u540d\u4e3a <code>employee_age<\/code>\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees RENAME COLUMN age TO employee_age;<\/code><\/pre>\n\n\n\n<p>\u5bf9\u4e8e<code>ALTER TABLE<\/code>\u7684\u64cd\u4f5c\u5176\u5b9e\u8fd8\u6709\u5f88\u591a\u884d\u751f\uff0c\u4f46\u662f\u54e5\u4eec\u7684\u8003\u8bd5\u57fa\u672c\u90fd\u4e0d\u4f1a\u6d89\u53ca\uff0c\u6240\u4ee5\u5728\u8fd9\u91cc\u53ef\u4ee5\u653e\u4e00\u4e9b\u5177\u4f53\u7684\u793a\u4f8b\u4f5c\u4e3a\u4e00\u4e2a\u7b80\u7b54\u7684\u53c2\u8003\u5373\u53ef\uff1a<\/p>\n\n\n\n<p>\u793a\u4f8b\uff1a\u4e3a <code>employees<\/code> \u8868\u7684 <code>employee_id<\/code> \u5217\u8bbe\u7f6e\u4e3b\u952e\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees ADD PRIMARY KEY (employee_id);<\/code><\/pre>\n\n\n\n<p>\u793a\u4f8b\uff1a\u4e3a <code>employees<\/code> \u8868\u7684 <code>department_id<\/code> \u5217\u6dfb\u52a0\u5916\u952e\u7ea6\u675f\uff0c\u5f15\u7528 <code>departments<\/code> \u8868\u7684 <code>department_id<\/code> \u5217\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees ADD CONSTRAINT fk_department FOREIGN KEY (department_id) REFERENCES departments(department_id);<\/code><\/pre>\n\n\n\n<p>\u793a\u4f8b\uff1a\u79fb\u9664\u8868\u4e2d\u7684\u7ea6\u675f\uff08\u53ea\u80fd\u5220\u9664\u5df2\u7ecf\u5b9a\u4e49\u7684\u4e3b\u952e\uff09\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees DROP PRIMARY KEY;<\/code><\/pre>\n\n\n\n<p>\u793a\u4f8b\uff1a\u79fb\u9664\u5916\u952e\u7ea6\u675f <code>fk_department<\/code>\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees DROP FOREIGN KEY fk_department;<\/code><\/pre>\n\n\n\n<p>\u793a\u4f8b\uff1a\u5c06\u8868 <code>employees<\/code> \u91cd\u547d\u540d\u4e3a <code>staff<\/code>\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE employees RENAME TO staff;<\/code><\/pre>\n\n\n\n<p>\u66f4\u591a\u64cd\u4f5c\u53ef\u4ee5\u4ea7\u8003\u4e0b\u9762GPT\u8001\u5e08\u7684\u8fd9\u4e2a\u8868\u683c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/\u622a\u5c4f2025-01-08-09.41.02-1024x677.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"677\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/\u622a\u5c4f2025-01-08-09.41.02-1024x677.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2384\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u63d2\u5165\u6570\u636e\uff08\u589e\uff09<\/h2>\n\n\n\n<p>\u4f7f\u7528<code>INSERT<\/code>\u5728\u8868\u683c\u4e2d\u63d2\u5165\u6570\u636e\u3002<code>INSERT<\/code>\u8bed\u53e5\u7684\u57fa\u672c\u8bed\u6cd5\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>INSERT INTO &lt;\u8868\u540d&gt; (&lt;\u5b57\u6bb51&gt;, &lt;\u5b57\u6bb52&gt;, ...) VALUES (&lt;\u503c1&gt;, &lt;\u503c2&gt;, ...);<\/code><\/pre>\n\n\n\n<p>\u4e3e\u4f8b\u6211\u4eec\u5728\u521a\u521a\u521b\u5efa\u7684<code>student<\/code>\u8868\u4e2d\u63d2\u5165\u4e00\u884c\u6570\u636e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>INSERT INTO student (\u5b66\u53f7, \u59d3\u540d, \u6027\u522b) VALUES (2024001, '\u6258\u6bd4', '\u7537');<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-16.49.44.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"614\" height=\"150\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-16.49.44.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1731\"  sizes=\"auto, (max-width: 614px) 100vw, 614px\" \/><\/div><\/figure>\n\n\n\n<p>\u53e6\u5916\u5982\u679c\u67d0\u4e9b\u5217\u5141\u8bb8\u4e3a\u7a7a\uff08<code>NULL<\/code>\uff09\u6216\u6709\u9ed8\u8ba4\u503c\uff0c\u53ef\u4ee5\u53ea\u63d2\u5165\u90e8\u5206\u5217\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u9700\u8981\u4e00\u6b21\u6027\u63d2\u5165\u591a\u6761\u8bb0\u5f55\uff0c\u76f4\u63a5\u5728<code>VALUES<\/code>\u540e\u9762\u7ee7\u7eed\u6dfb\u52a0\u5373\u53ef\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>INSERT INTO student (\u5b66\u53f7, \u59d3\u540d, \u6027\u522b) VALUES (2024001, '\u6258\u6bd4', '\u7537'), (2024002, '\u8482\u6cd5', '\u5973');<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u5220\u9664\u6570\u636e\uff08\u5220\uff09<\/h2>\n\n\n\n<p>\u53ef\u4ee5\u901a\u8fc7<code>DELETE<\/code>\u6765\u5220\u9664\u8868\u683c\u4e2d\u7684\u67d0\u4e00\u884c\u6570\u636e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DELETE FROM &lt;\u8868\u540d&gt; WHERE ...;<\/code><\/pre>\n\n\n\n<p>\u6bd4\u5982\u6211\u4eec\u5220\u9664\u521a\u521a\u63d2\u5165\u7684\u6258\u6bd4\u6570\u636e\uff0c<code>WHERE<\/code>\u540e\u9762\u53ef\u4ee5\u5199\u6258\u6bd4\u8fd9\u4e00\u884c\u7684\u76f8\u5173\u6761\u4ef6\uff08\u5b66\u53f7\uff0c\u59d3\u540d\uff0c\u6027\u522b\u4efb\u610f\u4e00\u9879\u5b9a\u4f4d\u5373\u53ef\uff09\u5373\u53ef\u5220\u9664\u8be5\u6761\u6570\u636e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DELETE FROM student WHERE \u5b66\u53f7 = 2024001;<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.02.15.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"646\" height=\"164\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.02.15.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1734\"  sizes=\"auto, (max-width: 646px) 100vw, 646px\" \/><\/div><\/figure>\n\n\n\n<p><code>DELETE<\/code>\u4e5f\u53ef\u4ee5\u901a\u8fc7\u6761\u4ef6\u5220\u9664\u591a\u6761\u6570\u636e\uff0c\u9996\u5148\u5229\u7528\u521a\u624d\u7684\u65b9\u6cd5\u6211\u4eec\u5148\u591a\u521b\u5efa\u51e0\u884c\u6570\u636e\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.09.03.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"576\" height=\"396\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.09.03.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1735\"  sizes=\"auto, (max-width: 576px) 100vw, 576px\" \/><\/div><\/figure>\n\n\n\n<p>\u6bd4\u5982\u6211\u4eec\u60f3\u8981\u5220\u9664\u6240\u6709\u6027\u522b\u4e3a<code>\u7537<\/code>\u7684\u6570\u636e\uff0c\u53ef\u4ee5\u8fd9\u6837\u505a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DELETE FROM student WHERE \u6027\u522b = '\u7537';<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.11.14.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"586\" height=\"232\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.11.14.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1736\"  sizes=\"auto, (max-width: 586px) 100vw, 586px\" \/><\/div><\/figure>\n\n\n\n<p>\u5173\u4e8e<code>DELETE<\/code>\u8fd8\u9700\u8981\u6ce8\u610f\u7684\u4e24\u70b9\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u6ca1\u6709\u67e5\u8be2\u5230<code>WHERE<\/code>\u540e\u9762\u7b26\u5408\u7684\u6761\u4ef6\u5185\u5bb9\uff08\u6bd4\u5982<code>WHERE \u5b66\u53f7 = 2023000<\/code>\uff09\uff0c\u4ee3\u7801\u662f<code>\u4e0d\u4f1a\u62a5\u9519<\/code>\u7684\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u4e0d\u52a0<code>WHERE<\/code>\u9650\u5236\u6761\u4ef6\uff0c<code>DELETE<\/code>\u4f1a\u5220\u9664\u6574\u4e2a\u8868\u683c\u7684\u6240\u6709\u6570\u636e\u5185\u5bb9\uff08<code>DELETE FROM &lt;\u8868\u540d&gt;<\/code>\uff09\uff0c\u6240\u4ee5\u9700\u8981<strong>\u7279\u522b\u5c0f\u5fc3<\/strong>\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u67e5\u8be2\u6570\u636e\uff08\u67e5\uff09<\/h2>\n\n\n\n<h4 class=\"wp-block-heading\">\u57fa\u672c\u67e5\u8be2<\/h4>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<code>SELECT<\/code>\u6765\u5b8c\u6210\u5bf9\u8868\u683c\u4e2d\u5185\u5bb9\u7684\u67e5\u8be2\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM &lt;\u8868\u540d&gt;;<\/code><\/pre>\n\n\n\n<p>\u8fd9\u6837\u6211\u4eec\u4fbf\u53ef\u4ee5\u5728\u4ee3\u7801\u7684\u8f93\u51fa\u7ed3\u679c\u4e2d\u770b\u5230\u8868\u683c\u5f53\u524d\u7684\u5185\u5bb9\u4e86\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM student;<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.21.35-1024x186.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"186\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.21.35-1024x186.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1740\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p>\u5176\u4e2d<code>SELECT<\/code>\u540e\u9762\u7684<code>*<\/code>\u8868\u793a\u7684\u662f\u8f93\u51fa\u8868\u683c\u4e2d\u6240\u6709\u7684\u5b57\u6bb5\uff0c\u5982\u679c\u6211\u4eec\u5c06<code>*<\/code>\u66ff\u6362\u4e3a<code>\u5b66\u53f7, \u59d3\u540d<\/code>\uff0c\u90a3\u4e48\u8f93\u51fa\u7684\u5185\u5bb9\u5c31\u4e0d\u4f1a\u5305\u542b<code>\u6027\u522b<\/code>\u5b57\u6bb5\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT \u5b66\u53f7, \u59d3\u540d FROM student;<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.53.29-1024x176.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"176\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.53.29-1024x176.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1754\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p>\u4e00\u4e2a\u6bd4\u8f83\u6709\u610f\u601d\u7684\u662f\uff0c<code>SELECT<\/code>\u540e\u9762\u4e0d\u52a0\u8868\u683c\uff0c\u53ef\u4ee5\u7528\u6765\u505a\u4e00\u4e9b\u7b80\u5355\u7684\u8ba1\u7b97\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT 100 + 50;<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.23.07-1024x130.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"130\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.23.07-1024x130.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1742\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u6761\u4ef6\u67e5\u8be2<\/h4>\n\n\n\n<p>\u4e0e<code>DELETE<\/code>\u4e00\u6837\uff0c<code>SELECT<\/code>\u4e5f\u53ef\u4ee5\u4f7f\u7528<code>WHERE<\/code>\u6765\u4f5c\u4e3a\u6761\u4ef6\u8bed\u53e5\u8fdb\u884c\u67e5\u8be2\u64cd\u4f5c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM &lt;\u8868\u540d&gt; WHERE &lt;\u6761\u4ef6\u8868\u8fbe\u5f0f&gt;;<\/code><\/pre>\n\n\n\n<p>\u5982\u679c\u6761\u4ef6\u6709\u591a\u4e2a\u7684\u65f6\u5019\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528<code>AND<\/code>\uff0c<code>OR<\/code>\u6765\u8fde\u63a5\u591a\u4e2a\u6761\u4ef6\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u5148\u5c06\u521a\u521a\u5220\u9664\u7684\u8868\u683c\u518d\u589e\u52a0\u4e00\u90e8\u5206\u6570\u636e\u4ee5\u4fdd\u8bc1\u8868\u683c\u6570\u636e\u7684\u591a\u6837\u6027\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.36.22-1024x254.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"254\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.36.22-1024x254.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1746\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM student WHERE \u6027\u522b &lt;&gt; '\u5973' AND \u59d3\u540d = '\u6258\u6bd4';<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.31.42-1024x131.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"131\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.31.42-1024x131.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1745\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p>\u4e0b\u9762\u662f <em><a href=\"https:\/\/liaoxuefeng.com\/books\/sql\/query\/where\/index.html\">@\u5ed6\u96ea\u5cf0\u7684\u5b98\u65b9\u7f51\u7ad9<\/a><\/em> \u4e2d\u5e38\u7528\u6761\u4ef6\u8868\u8fbe\u5f0f\u5b50\u7684\u603b\u7ed3\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.39.30-1024x368.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"368\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.39.30-1024x368.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1748\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u6a21\u7cca\u6761\u4ef6\u67e5\u8be2<\/h4>\n\n\n\n<p>\u5f53\u6211\u4eec\u4e0d\u5b8c\u5168\u786e\u5b9a\u8981\u67e5\u8be2\u7684\u5185\u5bb9\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<code>LIKE<\/code>\u8fdb\u884c\u67e5\u8be2\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM &lt;\u8868\u540d&gt; WHERE &lt;\u5b57\u6bb5&gt; LIKE '...%';<\/code><\/pre>\n\n\n\n<p>\u5176\u4e2d\u6211\u4eec\u5c31\u53ef\u4ee5\u4f7f\u7528<code>LIKE<\/code>\u53bb\u8868\u793a\u6211\u4eec\u4e0d\u786e\u5b9a\u7684\u5b57\u7b26\uff0c\u4f8b\u5982&#8217;\u6258%&#8217;\u5c06\u5339\u914d&#8217;\u6258\u6bd4&#8217;\uff0c&#8217;\u6258\u6bd4\u5927\u738b&#8217;\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM student WHERE \u59d3\u540d LIKE '\u6258%';<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.44.45-1-1024x177.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"177\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-17.44.45-1-1024x177.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1752\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4e0d\u7ba1\u67e5\u8be2\u7684\u6570\u636e\u7c7b\u578b\u662f\u4ec0\u4e48\uff0c<code>LIKE<\/code>\u5173\u952e\u5b57\u540e\u9762\u90fd\u5fc5\u987b\u52a0\u5355\u5f15\u53f7<code>''<\/code>\uff0c\u5426\u5219\u5c31\u4f1a\u62a5\u9519\uff01\u6bd4\u5982\u4e0b\u9762\u8fd9\u91cc\u50cf\u67e5\u627e\u5b66\u53f7\u662f2024\u5f00\u5934\u7684\uff0c\u5373\u4f7f\u8fd9\u91cc\u7684<code>\u5b66\u53f7<\/code>\u662f<code>BIGINT<\/code>\u578b\uff0c\u4f46\u662f\u4f9d\u65e7\u9700\u8981\u5199\u6210<code>'2024%'<\/code>\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM score WHERE \u5b66\u53f7 LIKE '2024%';<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u96c6\u5408\u67e5\u8be2<\/h4>\n\n\n\n<p><code>IN<\/code>&nbsp;\u64cd\u4f5c\u7b26\u7528\u4e8e<strong>\u68c0\u67e5\u67d0\u4e2a\u503c\u662f\u5426\u5728\u6307\u5b9a\u7684\u503c\u96c6\u5408\u4e2d<\/strong>\u3002\u5b83\u53ef\u4ee5\u66ff\u4ee3\u591a\u4e2a&nbsp;<code>OR<\/code>&nbsp;\u6761\u4ef6\u7684\u5199\u6cd5\uff0c\u4f7f\u67e5\u8be2\u66f4\u7b80\u6d01\u3002<\/p>\n\n\n\n<p><code>IN<\/code>\u7684\u4f7f\u7528\u516c\u5f0f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT &lt;\u5217\u540d&gt; FROM &lt;\u8868\u540d&gt; WHERE &lt;\u5217\u540d&gt; IN (&lt;\u503c1&gt;, &lt;\u503c2&gt;, &lt;\u503c3&gt;, \u2026);<\/code><\/pre>\n\n\n\n<p>\u6bd4\u5982\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<code>IN<\/code>\u6765\u67e5\u8be2\u591a\u4e2a\u4eba\u7684\u4fe1\u606f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM student WHERE \u59d3\u540d IN ('\u8482\u6cd5', '\u7231\u4e3d\u4e1d', '\u514b\u52b3\u5fb7');<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-07-00.17.04-1024x176.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"176\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-07-00.17.04-1024x176.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1807\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u6392\u5e8f\u67e5\u8be2<\/h4>\n\n\n\n<p>\u4e00\u822c\u6211\u4eec\u5728\u8f93\u51fa\u7ed3\u679c\u7684\u65f6\u5019\uff0c\u6570\u636e\u7684\u6392\u5e8f\u90fd\u662f\u6309\u7167\u4e3b\u952e\u4e5f\u5c31\u662f\u8fd9\u91cc\u7684\u5b66\u53f7\u8fdb\u884c\u6392\u5e8f\u7684\uff0c\u5982\u679c\u6211\u4eec\u9700\u8981\u4e0d\u540c\u7684\u8f93\u51fa\u6392\u5e8f\u65b9\u5f0f\uff0c\u4fbf\u53ef\u4ee5\u4f7f\u7528<code>ORDER BY<\/code>\u8bed\u53e5\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT &lt;\u5b57\u6bb51&gt;, &lt;\u5b57\u6bb52&gt;, ... FROM &lt;\u8868\u540d&gt; ORDER BY &lt;FROM\u524d\u9762\u7684\u5176\u4e2d\u82e5\u5e72\u4e2a\u5b57\u6bb5&gt; &lt;DESC&gt;;<\/code><\/pre>\n\n\n\n<p><code>ORDER BY<\/code>\u5b57\u6bb5\u540e\u9762\u7684<code>DESC<\/code>\u8868\u793a\u5012\u5e8f\u6392\u5217\uff0c<code>ASC<\/code>\u8868\u793a\u6b63\u5e8f\uff08\u53ef\u4ee5\u7701\u7565\u4e0d\u5199\uff09\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u524d\u4e00\u4e2a\u6392\u5e8f\u6761\u4ef6\u6709\u76f8\u540c\uff0c\u5219\u4f1a\u6309\u540e\u4e00\u4e2a\u6761\u4ef6\u518d\u6b21\u5bf9\u76f8\u540c\u7684\u5185\u5bb9\u8fdb\u884c\u6392\u5e8f\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\u6211\u4eec\u60f3\u67e5\u8be2<code>student<\/code>\u8fd9\u4e2a\u8868\u683c\uff0c\u5e76\u4e14\u6309\u7167\u59d3\u540d\u7684\u5012\u5e8f\u548c\u6027\u522b\u7684\u6b63\u5e8f\u6392\u5217\u8f93\u51fa\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM student ORDER BY \u59d3\u540d DESC, \u6027\u522b;<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-18.08.25-1024x254.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"254\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-18.08.25-1024x254.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1757\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u591a\u8868\u67e5\u8be2<\/h4>\n\n\n\n<p>\u591a\u8868\u67e5\u8be2\u7684\u903b\u8f91\u548c\u5355\u8868\u67e5\u8be2\u662f\u57fa\u672c\u4e00\u81f4\u7684\uff0c\u53ea\u662f\u5728<code>FROM<\/code>\u540e\u9762\u591a\u586b\u4e86\u82e5\u5e72\u4e2a\u8868\u540d\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT &lt;\u82e5\u5e72\u5b57\u6bb5\u540d&gt; FROM &lt;\u8868\u540d1&gt;, &lt;\u8868\u540d2&gt; WHERE &lt;\u6761\u4ef6\u8868\u8fbe\u5f0f&gt;;<\/code><\/pre>\n\n\n\n<p>\u503c\u7684\u6ce8\u610f\u7684\u4e00\u4e2a\u70b9\u662f\uff0c\u4e24\u4e2a\u8868\u4e2d\u8bf4\u660e\u5b57\u6bb5\u7684\u683c\u5f0f\u662f<code>\u8868\u540d.\u5b57\u6bb5\u540d<\/code>\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u5728\u4e0a\u9762\u521b\u5efa\u7684score\u8868\u4e2d\u5148\u7b80\u5355\u5199\u5165\u6570\u636e\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-19.10.52-1024x148.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"148\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-19.10.52-1024x148.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1764\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p><s>\u6211\u4eec\u53ef\u4ee5\u8fd9\u6837\u67e5\u8be2\u5404\u4e2a\u8868\u4e2d\u6211\u4eec\u9700\u8981\u7684\u4fe1\u606f\uff08\u8fd9\u91cc\u7531\u4e8escore\u4e2d\u7684\u6570\u636e\u6ca1\u6709\u586b\u5b8c\u6574\uff0c\u6240\u4ee5\u8fd9\u91cc\u67e5\u8be2\u7684\u65f6\u5019\uff0c\u7a7a\u767d\u7684\u6570\u636e\u5c31\u81ea\u52a8\u586b\u5145\u4e86\uff09\uff1a<\/s>\u51fa\u73b0\u4e0b\u9762\u7684\u539f\u56e0\u4e3b\u8981\u662f\u6b64\u5904\u7684\u4ee3\u7801\u662f\u8001\u5f0f\u7684\u591a\u8868\u67e5\u8be2\u5199\u6cd5\uff08\u9017\u53f7\u5206\u9694\u8868\u540d\u7684\u65b9\u5f0f\uff09\uff0c\u5b83\u5b9e\u9645\u6267\u884c\u7684\u662f\u7b1b\u5361\u5c14\u79ef\u64cd\u4f5c\uff0c\u6240\u4ee5\u5bfc\u81f4\u51fa\u73b0\u8fd9\u6837\u7684\u95ee\u9898\u3002\u3010Old School\u8001\u5e08\u771f\u7684\u662f\u8fd9\u4e48\u6559\u7684\u3011<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><s>SELECT student.\u5b66\u53f7, student.\u59d3\u540d, score.\u6570\u636e\u5e93 FROM student, score;<\/s><\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-19.13.11-1024x398.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"398\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-19.13.11-1024x398.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1767\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p>\u90a3\u4e48\u6b64\u5904\u6765\u8bf4\u660e\u73b0\u5728\u591a\u8868\u67e5\u8be2\u7684\u65b9\u6cd5\u3002\u6839\u636e\u67e5\u8be2\u76ee\u6807\u7684\u4e0d\u540c\uff0c\u53ef\u4ee5\u5206\u4e3a\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\uff1a<strong>\u5185\u8fde\u63a5<\/strong>\u3001<strong>\u5916\u8fde\u63a5<\/strong>\u3001<strong>\u4ea4\u53c9\u8fde\u63a5<\/strong>\u3001<strong>\u8054\u5408\u67e5\u8be2<\/strong>\u7b49\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u5185\u8fde\u63a5<\/h5>\n\n\n\n<p>\u5185\u8fde\u63a5\uff08<code>INNER JOIN<\/code>\uff09\u4ece\u4e24\u4e2a\u8868\u4e2d\u53d6\u51fa\u6ee1\u8db3\u6761\u4ef6\u7684\u6570\u636e\uff0c\u53ea\u6709\u5f53\u4e24\u4e2a\u8868\u4e2d\u90fd\u6709\u5339\u914d\u7684\u8bb0\u5f55\u65f6\uff0c\u7ed3\u679c\u624d\u4f1a\u5305\u542b\u8be5\u884c\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\u6211\u4eec\u6b64\u5904\u9700\u8981\u540c\u65f6\u67e5\u8be2\u51fa<code>student<\/code>\u8868\u4e2d\u7684<code>\u5b66\u53f7<\/code>\u548c<code>score<\/code>\u8868\u4e2d\u7684<code>\u6570\u636e\u5e93<\/code>\u548c<code>\u6570\u636e\u7ed3\u6784<\/code>\u4fe1\u606f\uff0c\u53ef\u4ee5\u5982\u4e0b\u64cd\u4f5c\u3002\u56e0\u4e3a\u662f\u5185\u8fde\u63a5\uff0c\u53ea\u6709\u540c\u65f6\u6ee1\u8db3\u4e24\u4e2a\u8868\u7684\u5339\u914d\u624d\u4f1a\u8f93\u51fa\uff0c\u6240\u4ee5<code>student<\/code>\u548c<code>score<\/code>\u6362\u4f4d\u7f6e\u4e0d\u4f1a\u5bf9\u7ed3\u679c\u6709\u5f71\u54cd\u3002\u53e6\u5916\u5982\u679c\u4e0d\u5199\u540e\u9762\u7684\u6761\u4ef6<code>ON student.\u5b66\u53f7 = score.\u5b66\u53f7<\/code>\uff0c\u4f1a\u51fa\u73b0\u4e4b\u524d\u4e0a\u9762\u90a3\u79cd\u9519\u8bef\u7684\u60c5\u51b5\uff08\u51fa\u73b0\u4e00\u6837\u7684\u540d\u5b57\u4e24\u6b21\uff0c\u5e76\u4e14\u6709\u83ab\u540d\u7684\u5206\u6570\uff0c\u63a8\u6d4b\u662f\u4ec0\u4e48\u7b1b\u5361\u5c14\u79ef\uff09\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT student.\u59d3\u540d, score.\u6570\u636e\u5e93, score.\u6570\u636e\u7ed3\u6784<br>FROM student<br>INNER JOIN score ON student.\u5b66\u53f7 = score.\u5b66\u53f7;<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/\u622a\u5c4f2025-01-08-11.45.15-1024x273.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"273\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/\u622a\u5c4f2025-01-08-11.45.15-1024x273.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2399\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h5 class=\"wp-block-heading\">\u5de6\u8fde\u63a5<\/h5>\n\n\n\n<p>\u4e0b\u9762\u4ecb\u7ecd\u7684\u51e0\u79cd\u65b9\u5f0f\u90fd\u57fa\u672c\u5f88\u5c11\u7528\uff0c\u4f5c\u4e3a\u4e86\u89e3\u5373\u53ef\u3002<\/p>\n\n\n\n<p>\u5de6\u8fde\u63a5\uff08<code>LEFT JOIN<\/code>\uff09\u53d6\u5de6\u8868\u7684\u6240\u6709\u6570\u636e\uff0c\u4ee5\u53ca\u4e0e\u53f3\u8868\u5339\u914d\u7684\u6570\u636e\u3002\u5982\u679c\u53f3\u8868\u6ca1\u6709\u5339\u914d\u7684\u8bb0\u5f55\uff0c\u5219\u5bf9\u5e94\u7684\u5b57\u6bb5\u4f1a\u663e\u793a\u4e3a <code>NULL<\/code>\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT student.\u5b66\u53f7, student.\u59d3\u540d, score.\u6570\u636e\u5e93, score.\u6570\u636e\u7ed3\u6784\nFROM student\nLEFT JOIN score ON student.\u5b66\u53f7 = score.\u5b66\u53f7;<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/\u622a\u5c4f2025-01-08-11.45.53-1024x378.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"378\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/\u622a\u5c4f2025-01-08-11.45.53-1024x378.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2401\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h5 class=\"wp-block-heading\">\u53f3\u8fde\u63a5<\/h5>\n\n\n\n<p>\u53f3\u8fde\u63a5\uff08<code>RIGHT JOIN<\/code>\uff09\u4e0e\u5de6\u8fde\u63a5\u7c7b\u4f3c\uff0c\u4f46\u4fdd\u7559\u53f3\u8868\u7684\u6240\u6709\u6570\u636e\u4ee5\u53ca\u4e0e\u5de6\u8868\u5339\u914d\u7684\u6570\u636e\u3002\u5982\u679c\u5de6\u8868\u6ca1\u6709\u5339\u914d\u8bb0\u5f55\uff0c\u5219\u5bf9\u5e94\u5b57\u6bb5\u4e3a <code>NULL<\/code>\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u5168\u5916\u8fde\u63a5<\/h5>\n\n\n\n<p>\u5168\u5916\u8fde\u63a5\uff08FULL OUTER JOIN\uff09\u53d6\u5de6\u53f3\u8868\u7684\u6240\u6709\u6570\u636e\uff0c\u5e76\u663e\u793a\u5339\u914d\u8bb0\u5f55\u3002\u6ca1\u6709\u5339\u914d\u7684\u8bb0\u5f55\u5bf9\u5e94\u5b57\u6bb5\u4e3a <code>NULL<\/code>\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>\u6ce8\u610f\uff1a<\/strong> MySQL \u4e0d\u76f4\u63a5\u652f\u6301 <code>FULL OUTER JOIN<\/code>\uff0c\u53ef\u4ee5\u901a\u8fc7 <code>UNION<\/code> \u6a21\u62df\u3002<\/p>\n<\/blockquote>\n\n\n\n<p>\u540e\u9762\u5176\u5b9e\u8fd8\u6709\u5f88\u591a\u8fde\u63a5\uff0c\u8fd9\u91cc\u90fd\u4e0d\u505a\u6d89\u53ca\u4e86\uff0c\u53ea\u638c\u63e1<code>INNER JOIN<\/code>\u5c31\u884c\u4e86\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u805a\u5408\u67e5\u8be2<\/h4>\n\n\n\n<p>\u805a\u5408\u67e5\u8be2\u53ef\u4ee5\u8ba9\u6211\u4eec\u5f97\u5230\u67d0\u4e00\u5217\u7684\u5408\u8ba1\u503c\u3001\u5e73\u5747\u503c\u3001\u6700\u5927\u503c\u548c\u6700\u5c0f\u503c\u7b49\u3002<\/p>\n\n\n\n<p> <a href=\"https:\/\/liaoxuefeng.com\/books\/sql\/query\/aggregation\/index.html\">@\u5ed6\u96ea\u5cf0\u7684\u5b98\u65b9\u7f51\u7ad9<\/a> \u4e2d\u5217\u4e86\u4ee5\u4e0a\u8fd9\u51e0\u4e2a\u805a\u5408\u51fd\u6570\u7684\u8bf4\u660e\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-19.22.35-1024x207.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"207\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-19.22.35-1024x207.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1769\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p>\u770b\u8868\u683c\u7684\u8bf4\u660e\u6211\u4eec\u4fbf\u53ef\u77e5\u5176\u7528\u5904\uff0cSQL\u63d0\u4f9b\u4e86\u4e13\u95e8\u7684\u805a\u5408\u51fd\u6570\uff0c\u4f7f\u7528\u805a\u5408\u51fd\u6570\u8fdb\u884c\u67e5\u8be2\uff0c\u5c31\u662f\u805a\u5408\u67e5\u8be2\uff0c\u5b83\u53ef\u4ee5\u5feb\u901f\u83b7\u5f97\u7ed3\u679c\u3002<\/p>\n\n\n\n<p>\u5e76\u4e14\u4f7f\u7528\u805a\u5408\u67e5\u8be2\u65f6\uff0c\u6211\u4eec\u5e94\u8be5\u7ed9\u5217\u540d\u8bbe\u7f6e\u4e00\u4e2a\u522b\u540d\uff0c\u5176\u4e3b\u8981\u7528\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT &lt;\u805a\u5408\u51fd\u6570&gt;(&lt;\u82e5\u5e72\u5b57\u6bb5&gt;) AS &lt;\u65b0\u7684\u5b57\u6bb5\u540d&gt; FROM &lt;\u8868\u540d&gt;;<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u6211\u4eec\u5c31\u53ea\u4ee5<code>COUNT<\/code>\u4f5c\u4e3a\u4e00\u4e2a\u4f8b\u5b50\u6765\u8bf4\u660e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT COUNT(*) AS num FROM student WHERE \u6027\u522b = '\u5973';<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-20.25.06-1024x134.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"134\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-20.25.06-1024x134.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1774\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u5d4c\u5957\u67e5\u8be2<\/h4>\n\n\n\n<p>\u5d4c\u5957\u67e5\u8be2\uff08\u4e5f\u79f0\u4e3a<strong>\u5b50\u67e5\u8be2<\/strong>\uff09\u662f\u6307\u5728\u4e00\u4e2a SQL \u8bed\u53e5\u4e2d\u5305\u542b\u53e6\u4e00\u4e2a SQL \u67e5\u8be2\u3002\u5b50\u67e5\u8be2\u901a\u5e38\u7528\u4e8e\u5728\u4e3b\u67e5\u8be2\u4e2d\u63d0\u4f9b\u4e00\u4e2a\u7ed3\u679c\u96c6\uff0c\u5e2e\u52a9\u7b5b\u9009\u3001\u6bd4\u8f83\u6216\u6c47\u603b\u6570\u636e\u3002\u5d4c\u5957\u67e5\u8be2\u7684\u516c\u5f0f\u53ef\u4ee5\u5199\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT &lt;\u5217\u540d&gt; FROM &lt;\u8868\u540d&gt; WHERE &lt;\u5217\u540d&gt; &lt;\u8fd0\u7b97\u7b26&gt; (&lt;\u5b50\u67e5\u8be2&gt;);<\/code><\/pre>\n\n\n\n<p>\u6bd4\u5982\u6211\u4eec\u60f3\u67e5\u8be2<code>student<\/code>\u8868\u4e2d\u4e00\u4e2a\u4eba\u7684\u4fe1\u606f\uff0c\u4f46\u662f\u6211\u4eec\u4e0d\u77e5\u9053\u4ed6\u76f8\u5173\u7684\u4fe1\u606f\uff0c\u53ea\u77e5\u9053\u4ed6<code>\u6570\u636e\u5e93<\/code>\u7684\u5206\u6570\u662f<code>98<\/code>\uff0c\u4f46\u662f\u8fd9\u4e2a\u5206\u6570\u7684\u6570\u636e\u662f\u5728<code>score<\/code>\u5f53\u4e2d\u7684\uff0c\u6240\u4ee5\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5d4c\u5957\u67e5\u8be2\u8fdb\u884c\u6570\u636e\u7684\u67e5\u627e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM student WHERE \u5b66\u53f7 = (SELECT \u5b66\u53f7 FROM score WHERE \u6570\u636e\u5e93 = 98);<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-07-00.23.49-1024x134.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"134\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-07-00.23.49-1024x134.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1813\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u66f4\u65b0\u6570\u636e\uff08\u6539\uff09<\/h2>\n\n\n\n<p>\u6700\u540e\u6211\u4eec\u4f7f\u7528<code>UPDATE<\/code>\u6765\u4fee\u6539\u66f4\u65b0\u8868\u683c\u5f53\u4e2d\u7684\u6570\u636e\u3002\u5176\u4e3b\u8981\u8bed\u6cd5\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>UPDATE &lt;\u8868\u540d&gt; SET \u5b57\u6bb51=\u503c1, \u5b57\u6bb52=\u503c2, ... WHERE ...;<\/code><\/pre>\n\n\n\n<p><code>WHERE<\/code>\u524d\u9762\u662f\u4fee\u6539\u540e\u7684\u5185\u5bb9\uff0c<code>WHERE<\/code>\u540e\u9762\u662f\u7528\u4e8e\u5b9a\u4f4d\u6570\u636e\u7684\u6761\u4ef6\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\u6211\u4eec\u60f3\u628a\u539f\u6765<code>student<\/code>\u4e2d<code>\u6258\u6bd4\u5927\u738b<\/code>\u7684\u6027\u522b\u6539\u6210<code>\u5973<\/code>\uff0c\u6211\u4eec\u4fbf\u53ef\u4ee5\u50cf\u4e0b\u9762\u8fd9\u6837\u64cd\u4f5c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>UPDATE student SET \u6027\u522b = '\u5973' WHERE \u59d3\u540d = '\u6258\u6bd4\u5927\u738b';<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-20.30.34-1024x254.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"254\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-20.30.34-1024x254.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1777\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p>\u8fd9\u91cc<code>WHERE<\/code>\u76f8\u5173\u7684\u903b\u8f91\u4e5f\u662f\u548c\u4e4b\u524d\u4e00\u6837\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u4e00\u6b21\u6027\u66f4\u6539\u8868\u4e2d\u7684\u591a\u4e2a\u5185\u5bb9\u3002\u6bd4\u5982\u6211\u4eec\u60f3\u628a<code>\u5b66\u53f7<\/code>\u5c0f\u4e8e\u7b49\u4e8e<code>2024004<\/code>\u7684<code>\u6027\u522b<\/code>\u90fd\u6539\u6210<code>\u672a\u77e5<\/code>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>UPDATE student SET \u6027\u522b = '\u672a\u77e5' WHERE \u5b66\u53f7 &lt;= 2024004;<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-20.39.29-1024x259.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"259\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2024\/11\/\u622a\u5c4f2024-11-06-20.39.29-1024x259.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1779\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u6743\u9650\u76f8\u5173<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u6388\u6743\u547d\u4ee4<\/h3>\n\n\n\n<p><code>GRANT<\/code>\u547d\u4ee4\u7528\u4e8e\u5411\u7528\u6237\u6216\u89d2\u8272\u6388\u4e88\u6743\u9650\uff0c\u5141\u8bb8\u4ed6\u4eec\u5bf9\u6570\u636e\u5e93\u7684\u5bf9\u8c61\uff08\u5982\u8868\u3001\u89c6\u56fe\u3001\u5e8f\u5217\u7b49\uff09\u6267\u884c\u7279\u5b9a\u7684\u64cd\u4f5c\u3002\u901a\u7528\u7684\u6388\u6743\u65b9\u5f0f\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>GRANT &lt;\u6743\u9650\u5217\u8868&gt; ON &lt;\u5bf9\u8c61\u540d&gt; TO &lt;\u7528\u6237\u540d&gt;;<\/code><\/pre>\n\n\n\n<p><code>\u6743\u9650\u5217\u8868<\/code>\u6307\u7684\u662f\u7ed9\u4e88\u7528\u6237\u7684\u4e00\u4e9b\u6743\u9650\uff0c\u5e38\u89c1\u7684\u4e3b\u8981\u6709\uff1a<code>SELECT<\/code>\u3001<code>INSERT<\/code>\u3001<code>UPDATE<\/code>\u3002\u5176\u4f59\u7684\u4e00\u4e9b\u6743\u9650\u53ef\u4ee5\u53c2\u8003GPT\u8001\u5e08\u5217\u51fa\u6765\u7684\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/\u622a\u5c4f2025-01-07-20.02.38-1024x390.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"390\" data-original=\"https:\/\/tobykskgd.life\/wp-content\/uploads\/2025\/01\/\u622a\u5c4f2025-01-07-20.02.38-1024x390.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2302\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p><code>\u5bf9\u8c61\u540d<\/code>\u4e3b\u8981\u6307\u7684\u5c31\u662f\u7ed9\u4e88\u7528\u6237\u6743\u9650\u53ef\u64cd\u4f5c\u7684<strong>\u8868<\/strong>\uff0c\u5f53\u7136\u4e5f\u4e0d\u6b62\u4ec5\u9650\u4e8e\u8868\uff0c\u5176\u5b83\u7684\u8fd8\u6709\u89c6\u56fe\u3001\u5b58\u50a8\u8fc7\u7a0b\u3001\u6570\u636e\u5e93\u7b49\u3002<\/p>\n\n\n\n<p><code>\u7528\u6237\u540d<\/code>\u5c31\u662f\u7ed9\u4e88\u6743\u9650\u7684\u7528\u6237\u7684\u540d\u5b57\u3002<\/p>\n\n\n\n<p>\u793a\u4f8b\uff1a\u628a\u5bf9\u8868<code>student<\/code>\u67e5\u8be2\u3001\u5220\u9664\u3001\u63d2\u5165\u7684\u6743\u9650\u7ed9\u4e88\u7528\u6237<code>zhang<\/code>\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>GRANT SELECT, INSERT, DELETE ON student TO zhang;<\/code><\/pre>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528<code>ALL<\/code>\u5173\u952e\u5b57\u7ed9\u4e88\u7528\u6237\u6240\u6709\u7684\u6743\u9650\uff0c\u5f53\u7136\u4e00\u822c\u6700\u597d\u4e0d\u8981\u628a\u6240\u6709\u6743\u9650\u90fd\u4ea4\u7ed9\u7528\u6237\uff0c\u4e0d\u7136\u5bb9\u6613\u51fa\u73b0\u8bef\u5220\u7b49\u5404\u79cd\u95ee\u9898\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>GRANT ALL ON student TO zhang;<\/code><\/pre>\n\n\n\n<p><code>PUBLIC<\/code>\u4ee3\u8868\u7684\u662f\u6240\u6709\u7684\u7528\u6237\uff0c\u5982\u679c\u8981\u7ed9\u6240\u6709\u7528\u6237\u6743\u9650\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>GRANT ALL ON student TO PUBLIC;<\/code><\/pre>\n\n\n\n<p>\u5728\u8bed\u53e5\u6700\u540e\u52a0\u4e0a<code>WITH GRANT OPTION<\/code>\uff0c\u5141\u8bb8\u7528\u6237\u5c06\u6743\u9650\u4ea4\u7ed9\u522b\u7684\u7528\u6237\uff0c<strong>\u540c\u65f6\u8be5\u7528\u6237\u672c\u8eab\u4f9d\u65e7\u62e5\u6709\u539f\u6765\u7684\u6743\u9650<\/strong>\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>GRANT ALL ON student TO zhang WITH GRANT OPTION;<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u89e3\u6743\u547d\u4ee4<\/h3>\n\n\n\n<p>\u5982\u679c\u9700\u8981\u64a4\u9500\u7528\u6237\u7684\u6743\u9650\uff0c\u53ef\u4ee5\u4f7f\u7528<code>REVOKE<\/code>\u547d\u4ee4\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>REVOKE &lt;\u6743\u9650\u5217\u8868&gt; ON &lt;\u5bf9\u8c61\u540d&gt; FROM &lt;\u7528\u6237\u540d&gt;;<\/code><\/pre>\n\n\n\n<p>\u57fa\u672c\u7684\u4f7f\u7528\u65b9\u6cd5\u53ef\u4ee5\u53c2\u8003\u524d\u9762\u7684<code>GRANT<\/code>\u547d\u4ee4\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f<code>REVOKE<\/code>\u91cc\u7684\u5173\u952e\u5b57\u662f<code>FROM<\/code>\uff0c\u6ce8\u610f\u548c\u524d\u9762<code>GRANT<\/code>\u7684<code>TO<\/code>\u505a\u533a\u5206\u3002<\/p>\n\n\n\n<p>\u793a\u4f8b\uff1a\u89e3\u9664<code>zhang<\/code>\u5bf9\u8868<code>student<\/code>\u67e5\u8be2\u3001\u5220\u9664\u7684\u6743\u9650\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>REVOKE SELECT, DELETE ON student FROM zhang;<\/code><\/pre>\n\n\n\n<p>\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u76f4\u63a5\u4f7f\u7528<code>REVOKE<\/code>\u9664\u4e86\u5220\u9664\u7528\u6237\u7684\u57fa\u672c\u6743\u9650\uff0c\u8fd8\u4f1a\u4e00\u5e76\u5220\u9664\u7528\u6237\u7684<code>WITH GRANT OPITION<\/code>\u6743\u9650\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u53ea\u60f3\u64a4\u9500\u7528\u6237\u7684<code>WITH GRANT OPTION<\/code>\u6743\u9650\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>REVOKE GRANT OPTION FOR SELECT ON student FROM zhang;<\/code><\/pre>\n\n\n\n<h1 class=\"wp-block-heading\">SQL\u4e2d\u5e38\u89c1\u6570\u636e\u7c7b\u578b\u6c47\u603b<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">\u6574\u6570\u7c7b\u578b<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8ff7\u4f60\u6574\u578b\uff1a<code>TINYINT<\/code>\uff0c\u4f7f\u7528<strong>1\u4e2a\u5b57\u8282<\/strong>\u5b58\u50a8\u6574\u6570\uff0c\u6700\u591a\u5b58\u50a8256\u4e2a\u6574\u6570\uff08-128~127\uff09<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u77ed\u6574\u578b\uff1a<code>SMALLINT<\/code>\uff0c\u4f7f\u7528<strong>2\u4e2a\u5b57\u8282<\/strong>\u5b58\u50a8\u6574\u6570<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e2d\u6574\u578b\uff1a<code>MEDIUMINT<\/code>\uff0c\u4f7f\u7528<strong>3\u4e2a\u5b57\u8282<\/strong>\u5b58\u50a8\u6574\u6570<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6807\u51c6\u6574\u578b\uff1a<code>INT<\/code>\uff0c\u4f7f\u7528<strong>4\u4e2a\u5b57\u8282<\/strong>\u5b58\u50a8\u6574\u6570<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5927\u6574\u578b\uff1a<code>BIGINT<\/code>\uff0c\u4f7f\u7528<strong>8\u4e2a\u5b57\u8282<\/strong>\u5b58\u50a8<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5c0f\u6570\u7c7b\u578b<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5355\u7cbe\u5ea6\uff1a<strong><code>FLOAT<\/code><\/strong>\uff0c\u4f7f\u7528<strong>4\u4e2a\u5b57\u8282<\/strong>\u5b58\u50a8\uff0c\u7cbe\u5ea6\u8303\u56f4\u4e3a6-7\u4f4d\u6709\u6548\u6570\u5b57<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53cc\u7cbe\u5ea6\uff1a<strong><code>DOUBLE<\/code><\/strong>\uff0c\u4f7f\u7528<strong>8\u4e2a\u5b57\u8282<\/strong>\u5b58\u50a8\uff0c\u7cbe\u5ea6\u8303\u56f4\u4e3a14-15\u4f4d\u6709\u6548\u6570\u5b57<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b57\u7b26\u4e32\u7c7b\u578b<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5b9a\u957f\u578b<\/strong>\uff1a<code>CHAR(L)<\/code>\uff0c\u4f7f\u7528L\u6307\u5b9a<strong>\u56fa\u5b9a\u957f\u5ea6\u7684\u5b58\u50a8\u7a7a\u95f4<\/strong>\u5b58\u50a8\u5b57\u7b26\u4e32<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u53d8\u957f\u578b<\/strong>\uff1a<code>VARCHAR(L)<\/code>\uff0c\u6839\u636e\u5b9e\u9645\u5b58\u50a8\u7684\u6570\u636e\u53d8\u5316\u5b58\u50a8\u7a7a\u95f4<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6587\u672c\u5b57\u7b26\u4e32<\/strong>\uff1a<code>TEXT<\/code>\/<code>BLOB<\/code>\uff0c\u4e13\u95e8\u7528\u6765\u5b58\u50a8\u8f83\u957f\u7684\u6587\u672c<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u679a\u4e3e\u578b<\/strong>\uff1a<code>ENUM<\/code>, \u4e00\u79cd<strong>\u6620\u5c04\u5b58\u50a8<\/strong>\u65b9\u5f0f\uff0c\u4ee5\u8f83\u5c0f\u7684\u7a7a\u95f4\u5b58\u50a8\u8f83\u591a\u7684\u6570\u636e<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u96c6\u5408\u578b<\/strong>\uff1a<code>SET<\/code>\uff0c\u4e00\u79cd<strong>\u6620\u5c04\u5b58\u50a8<\/strong>\u65b9\u5f0f\uff0c\u4ee5\u8f83\u5c0f\u7684\u7a7a\u95f4\u5b58\u50a8\u8f83\u591a\u7684\u6570\u636e<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u65e5\u671f\u7c7b\u578b<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5e74<\/strong>\uff1a<code>YEAR<\/code>\uff0cMySQL\u4e2d\u7528\u6765\u5b58\u50a8\u5e74\u4efd\u7684\u7c7b\u578b<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u65f6\u95f4\u6233<\/strong>\uff1a<code>TIMESTAMP<\/code>\uff0c\u57fa\u4e8e\u683c\u6797\u5a01\u6cbb\u65f6\u95f4\u7684\u65f6\u95f4\u8bb0\u5f55<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u65e5\u671f<\/strong>\uff1a<code>DATA<\/code>\uff0c\u7528\u6765\u8bb0\u5f55\u5e74\u6708\u65e5\u4fe1\u606f<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u65e5\u671f\u65f6\u95f4<\/strong>\uff1a<code>DATATIME<\/code>\uff0c\u7528\u6765\u7efc\u5408\u5b58\u50a8\u65e5\u671f\u548c\u65f6\u95f4<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u65f6\u95f4<\/strong>\uff1a<code>TIME<\/code>\uff0c\u7528\u6765\u8bb0\u5f55\u65f6\u95f4\u6216\u8005\u65f6\u95f4\u6bb5<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u5728\u4e4b\u524d\u90a3\u7bc7\u6570\u636e\u5e93\u7cfb\u7edf\u7b80\u5355\u5185\u5bb9\u6c47\u603b\u7684\u57fa\u7840\u4e0a\u8865\u5145\u671f\u672b\u65b0\u7684\u5185\u5bb9\u4f5c\u4e3a\u590d\u4e60\u7684\u6574\u7406\uff0c\u5e76\u4e14\u81f4\u656c\u67d0\u5149\u6027\u5382\u5546\u6216\u8005A [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2315,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[3,49],"class_list":["post-2284","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-xxbj","tag-xxbj","tag-qmfx"],"_links":{"self":[{"href":"https:\/\/tobykskgd.life\/index.php\/wp-json\/wp\/v2\/posts\/2284","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tobykskgd.life\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tobykskgd.life\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tobykskgd.life\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tobykskgd.life\/index.php\/wp-json\/wp\/v2\/comments?post=2284"}],"version-history":[{"count":83,"href":"https:\/\/tobykskgd.life\/index.php\/wp-json\/wp\/v2\/posts\/2284\/revisions"}],"predecessor-version":[{"id":2431,"href":"https:\/\/tobykskgd.life\/index.php\/wp-json\/wp\/v2\/posts\/2284\/revisions\/2431"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tobykskgd.life\/index.php\/wp-json\/wp\/v2\/media\/2315"}],"wp:attachment":[{"href":"https:\/\/tobykskgd.life\/index.php\/wp-json\/wp\/v2\/media?parent=2284"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tobykskgd.life\/index.php\/wp-json\/wp\/v2\/categories?post=2284"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tobykskgd.life\/index.php\/wp-json\/wp\/v2\/tags?post=2284"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}