{"id":187336,"date":"2024-11-11T13:25:18","date_gmt":"2024-11-11T05:25:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/187336\/"},"modified":"2024-11-11T13:25:19","modified_gmt":"2024-11-11T05:25:19","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%96%e9%8d%b5%e8%a8%ad%e8%a8%88%e8%a6%81%e9%bb%9e%e8%a9%b3%e8%a7%a3-%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e5%a4%96%e9%8d%b5%e8%a8%ad%e8%a8%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/187336\/","title":{"rendered":"\u6578\u64da\u5eab\u5916\u9375\u8a2d\u8a08\u8981\u9ede\u8a73\u89e3 (\u6578\u64da\u5eab\u8868\u5916\u9375\u8a2d\u8a08)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%96%e9%8d%b5%e8%a8%ad%e8%a8%88%e8%a6%81%e9%bb%9e%e8%a9%b3%e8%a7%a3-%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e5%a4%96%e9%8d%b5%e8%a8%ad%e8%a8%88-hXLLEaPHXu\">\u6578\u64da\u5eab\u5916\u9375\u8a2d\u8a08\u8981\u9ede\u8a73\u89e3 (\u6578\u64da\u5eab\u8868\u5916\u9375\u8a2d\u8a08)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u5916\u9375\uff08Foreign Key\uff09\u662f\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u7528\u65bc\u5efa\u7acb\u548c\u5f37\u5316\u6578\u64da\u8868\u4e4b\u9593\u7684\u95dc\u806f\u6027\u3002\u5916\u9375\u7684\u8a2d\u8a08\u4e0d\u50c5\u5f71\u97ff\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u9084\u5f71\u97ff\u67e5\u8a62\u7684\u6548\u7387\u548c\u6578\u64da\u7684\u53ef\u7dad\u8b77\u6027\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u6578\u64da\u5eab\u5916\u9375\u8a2d\u8a08\u7684\u8981\u9ede\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u61c9\u7528\u9019\u4e00\u6280\u8853\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%a4%96%e9%8d%b5%ef%bc%9f-hXLLEaPHXu\">\u4ec0\u9ebc\u662f\u5916\u9375\uff1f<\/h2>\n<p>\u5916\u9375\u662f\u6307\u4e00\u500b\u8868\u4e2d\u7684\u4e00\u500b\u6216\u591a\u500b\u5b57\u6bb5\uff0c\u9019\u4e9b\u5b57\u6bb5\u7528\u4f86\u53c3\u8003\u53e6\u4e00\u500b\u8868\u4e2d\u7684\u4e3b\u9375\u3002\u5916\u9375\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u78ba\u4fdd\u6578\u64da\u7684\u53c3\u7167\u5b8c\u6574\u6027\uff0c\u9632\u6b62\u51fa\u73fe\u5b64\u7acb\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u500b\u8a02\u55ae\u7cfb\u7d71\u4e2d\uff0c\u8a02\u55ae\u8868\u4e2d\u7684\u5ba2\u6236ID\u53ef\u4ee5\u4f5c\u70ba\u5916\u9375\uff0c\u53c3\u8003\u5ba2\u6236\u8868\u4e2d\u7684\u4e3b\u9375ID\u3002<\/p>\n<h2 id=\"%e5%a4%96%e9%8d%b5%e7%9a%84%e8%a8%ad%e8%a8%88%e8%a6%81%e9%bb%9e-hXLLEaPHXu\">\u5916\u9375\u7684\u8a2d\u8a08\u8981\u9ede<\/h2>\n<h3 id=\"1-%e7%a2%ba%e5%ae%9a%e9%97%9c%e8%81%af%e6%80%a7-hXLLEaPHXu\">1. \u78ba\u5b9a\u95dc\u806f\u6027<\/h3>\n<p>\u5728\u8a2d\u8a08\u5916\u9375\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u660e\u78ba\u6578\u64da\u8868\u4e4b\u9593\u7684\u95dc\u806f\u6027\u3002\u9019\u5305\u62ec\u4e00\u5c0d\u4e00\u3001\u4e00\u5c0d\u591a\u548c\u591a\u5c0d\u591a\u7684\u95dc\u4fc2\u3002\u6839\u64da\u4e0d\u540c\u7684\u95dc\u4fc2\uff0c\u5916\u9375\u7684\u8a2d\u8a08\u6703\u6709\u6240\u4e0d\u540c\uff1a<\/p>\n<ul>\n<li><strong>\u4e00\u5c0d\u4e00\uff1a<\/strong>\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u5169\u500b\u8868\u4e2d\u7684\u8a18\u9304\u4e00\u4e00\u5c0d\u61c9\uff0c\u901a\u5e38\u5728\u4e00\u500b\u8868\u4e2d\u8a2d\u7f6e\u5916\u9375\u53c3\u8003\u53e6\u4e00\u500b\u8868\u7684\u4e3b\u9375\u3002<\/li>\n<li><strong>\u4e00\u5c0d\u591a\uff1a<\/strong>\u4e00\u500b\u8868\u7684\u8a18\u9304\u53ef\u4ee5\u5c0d\u61c9\u591a\u500b\u53e6\u4e00\u500b\u8868\u7684\u8a18\u9304\uff0c\u901a\u5e38\u5728\u201c\u591a\u201d\u7684\u90a3\u4e00\u65b9\u8a2d\u7f6e\u5916\u9375\u3002<\/li>\n<li><strong>\u591a\u5c0d\u591a\uff1a<\/strong>\u9700\u8981\u4f7f\u7528\u4e00\u500b\u4e2d\u4ecb\u8868\u4f86\u5efa\u7acb\u5169\u500b\u8868\u4e4b\u9593\u7684\u95dc\u806f\uff0c\u9019\u500b\u4e2d\u4ecb\u8868\u901a\u5e38\u5305\u542b\u5169\u500b\u5916\u9375\uff0c\u5206\u5225\u53c3\u8003\u5169\u500b\u4e3b\u8868\u7684\u4e3b\u9375\u3002<\/li>\n<\/ul>\n<h3 id=\"2-%e9%81%b8%e6%93%87%e5%90%88%e9%81%a9%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-hXLLEaPHXu\">2. \u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b<\/h3>\n<p>\u5916\u9375\u7684\u6578\u64da\u985e\u578b\u5fc5\u9808\u8207\u5176\u53c3\u8003\u7684\u4e3b\u9375\u6578\u64da\u985e\u578b\u4e00\u81f4\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4e3b\u9375\u662f\u6574\u6578\u985e\u578b\uff0c\u5247\u5916\u9375\u4e5f\u61c9\u8a72\u662f\u6574\u6578\u985e\u578b\u3002<\/p>\n<h3 id=\"3-%e8%a8%ad%e7%bd%ae%e7%b4%84%e6%9d%9f%e6%a2%9d%e4%bb%b6-hXLLEaPHXu\">3. \u8a2d\u7f6e\u7d04\u675f\u689d\u4ef6<\/h3>\n<p>\u5728\u8a2d\u8a08\u5916\u9375\u6642\uff0c\u61c9\u8003\u616e\u8a2d\u7f6e\u7d04\u675f\u689d\u4ef6\uff0c\u4ee5\u5f37\u5316\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u5e38\u898b\u7684\u7d04\u675f\u689d\u4ef6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>CASCADE\uff1a<\/strong>\u7576\u4e3b\u8868\u4e2d\u7684\u8a18\u9304\u88ab\u522a\u9664\u6216\u66f4\u65b0\u6642\uff0c\u81ea\u52d5\u522a\u9664\u6216\u66f4\u65b0\u53c3\u8003\u8a72\u8a18\u9304\u7684\u5916\u9375\u8a18\u9304\u3002<\/li>\n<li><strong>SET NULL\uff1a<\/strong>\u7576\u4e3b\u8868\u4e2d\u7684\u8a18\u9304\u88ab\u522a\u9664\u6216\u66f4\u65b0\u6642\uff0c\u5c07\u5916\u9375\u8a2d\u7f6e\u70baNULL\u3002<\/li>\n<li><strong>NO ACTION\uff1a<\/strong>\u5982\u679c\u4e3b\u8868\u4e2d\u7684\u8a18\u9304\u88ab\u522a\u9664\u6216\u66f4\u65b0\uff0c\u5247\u4e0d\u57f7\u884c\u4efb\u4f55\u64cd\u4f5c\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h3 id=\"4-%e8%80%83%e6%85%ae%e6%80%a7%e8%83%bd%e5%bd%b1%e9%9f%bf-hXLLEaPHXu\">4. \u8003\u616e\u6027\u80fd\u5f71\u97ff<\/h3>\n<p>\u5916\u9375\u7684\u4f7f\u7528\u6703\u5f71\u97ff\u6578\u64da\u5eab\u7684\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u9032\u884c\u5927\u91cf\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\u6642\u3002\u8a2d\u8a08\u6642\u61c9\u8003\u616e\u5230\u9019\u4e00\u9ede\uff0c\u4e26\u6839\u64da\u5be6\u969b\u9700\u6c42\u9078\u64c7\u662f\u5426\u4f7f\u7528\u5916\u9375\u3002\u5c0d\u65bc\u67d0\u4e9b\u9ad8\u6027\u80fd\u9700\u6c42\u7684\u61c9\u7528\uff0c\u53ef\u4ee5\u8003\u616e\u5728\u61c9\u7528\u5c64\u9762\u9032\u884c\u6578\u64da\u5b8c\u6574\u6027\u6aa2\u67e5\uff0c\u800c\u4e0d\u662f\u4f9d\u8cf4\u6578\u64da\u5eab\u7684\u5916\u9375\u7d04\u675f\u3002<\/p>\n<h3 id=\"5-%e6%96%87%e6%aa%94%e5%8c%96%e8%a8%ad%e8%a8%88-hXLLEaPHXu\">5. \u6587\u6a94\u5316\u8a2d\u8a08<\/h3>\n<p>\u5728\u5b8c\u6210\u5916\u9375\u8a2d\u8a08\u5f8c\uff0c\u61c9\u8a72\u5c0d\u8a2d\u8a08\u9032\u884c\u8a73\u7d30\u7684\u6587\u6a94\u5316\uff0c\u8a18\u9304\u6bcf\u500b\u5916\u9375\u7684\u7528\u9014\u3001\u95dc\u806f\u7684\u8868\u4ee5\u53ca\u7d04\u675f\u689d\u4ef6\u7b49\u4fe1\u606f\u3002\u9019\u4e0d\u50c5\u6709\u52a9\u65bc\u5718\u968a\u6210\u54e1\u4e4b\u9593\u7684\u6e9d\u901a\uff0c\u4e5f\u65b9\u4fbf\u672a\u4f86\u7684\u7dad\u8b77\u548c\u64f4\u5c55\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-hXLLEaPHXu\">\u7d50\u8ad6<\/h2>\n<p>\u5916\u9375\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\uff0c\u6b63\u78ba\u7684\u5916\u9375\u8a2d\u8a08\u80fd\u5920\u6709\u6548\u5730\u7dad\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u901a\u904e\u660e\u78ba\u95dc\u806f\u6027\u3001\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u3001\u8a2d\u7f6e\u7d04\u675f\u689d\u4ef6\u3001\u8003\u616e\u6027\u80fd\u5f71\u97ff\u4ee5\u53ca\u6587\u6a94\u5316\u8a2d\u8a08\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8a2d\u8a08\u51fa\u9ad8\u6548\u4e14\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc\u6578\u64da\u5eab\u8a2d\u8a08\u53ca\u5176\u5728\u96f2\u74b0\u5883\u4e2d\u7684\u61c9\u7528\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u6211\u5011\u63d0\u4f9b\u5404\u7a2e <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u5eab\u548c\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0e\u6578\u64da\u5eab\u5916\u9375\u8a2d\u8a08\u7684\u8981\u9ede\uff0c\u5e6b\u52a9\u60a8\u6709\u6548\u7ba1\u7406\u6578\u64da\u95dc\u806f\u6027\uff0c\u63d0\u5347\u6578\u64da\u5b8c\u6574\u6027\u8207\u67e5\u8a62\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-187336","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187336","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=187336"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187336\/revisions"}],"predecessor-version":[{"id":187337,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187336\/revisions\/187337"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=187336"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=187336"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=187336"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}