{"id":183262,"date":"2024-11-10T03:21:19","date_gmt":"2024-11-09T19:21:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/183262\/"},"modified":"2024-11-10T03:21:20","modified_gmt":"2024-11-09T19:21:20","slug":"%e5%af%a6%e7%8f%be%e9%ab%98%e6%95%88%e6%95%b8%e6%93%9a%e7%ae%a1%e7%90%86%ef%bc%9a%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a7%b8%e7%99%bc%e5%99%a8%e9%80%a3%e7%b4%9a%e5%88%aa","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/183262\/","title":{"rendered":"\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u7ba1\u7406\uff1a\u6df1\u5165\u4e86\u89e3\u6578\u64da\u5eab\u89f8\u767c\u5668\u9023\u7d1a\u522a\u9664 (\u6578\u64da\u5eab\u89f8\u767c\u5668\u9023\u7d1a\u522a\u9664)"},"content":{"rendered":"<h1 id=\"%e5%af%a6%e7%8f%be%e9%ab%98%e6%95%88%e6%95%b8%e6%93%9a%e7%ae%a1%e7%90%86%ef%bc%9a%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a7%b8%e7%99%bc%e5%99%a8%e9%80%a3%e7%b4%9a%e5%88%aa-bcLFqUexbX\">\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u7ba1\u7406\uff1a\u6df1\u5165\u4e86\u89e3\u6578\u64da\u5eab\u89f8\u767c\u5668\u9023\u7d1a\u522a\u9664<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u7ba1\u7406\u7684\u6548\u7387\u5c0d\u65bc\u4f01\u696d\u7684\u6210\u529f\u81f3\u95dc\u91cd\u8981\u3002\u6578\u64da\u5eab\u4f5c\u70ba\u4fe1\u606f\u5b58\u5132\u548c\u7ba1\u7406\u7684\u6838\u5fc3\uff0c\u5fc5\u9808\u5177\u5099\u9ad8\u6548\u7684\u64cd\u4f5c\u6a5f\u5236\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u6578\u64da\u5eab\u89f8\u767c\u5668\uff08Triggers\uff09\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u81ea\u52d5\u57f7\u884c\u7279\u5b9a\u64cd\u4f5c\uff0c\u7279\u5225\u662f\u5728\u6578\u64da\u522a\u9664\u6642\uff0c\u9023\u7d1a\u522a\u9664\uff08Cascading Delete\uff09\u662f\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a7%b8%e7%99%bc%e5%99%a8%ef%bc%9f-bcLFqUexbX\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u89f8\u767c\u5668\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u89f8\u767c\u5668\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u5b58\u5132\u904e\u7a0b\uff0c\u5b83\u5728\u7279\u5b9a\u4e8b\u4ef6\u767c\u751f\u6642\u81ea\u52d5\u57f7\u884c\u3002\u9019\u4e9b\u4e8b\u4ef6\u901a\u5e38\u5305\u62ec\u63d2\u5165\uff08INSERT\uff09\u3001\u66f4\u65b0\uff08UPDATE\uff09\u6216\u522a\u9664\uff08DELETE\uff09\u64cd\u4f5c\u3002\u89f8\u767c\u5668\u53ef\u4ee5\u7528\u4f86\u57f7\u884c\u6578\u64da\u9a57\u8b49\u3001\u8a18\u9304\u8b8a\u66f4\u6216\u81ea\u52d5\u66f4\u65b0\u5176\u4ed6\u8868\u4e2d\u7684\u6578\u64da\u3002<\/p>\n<h2 id=\"%e9%80%a3%e7%b4%9a%e5%88%aa%e9%99%a4%e7%9a%84%e6%a6%82%e5%bf%b5-bcLFqUexbX\">\u9023\u7d1a\u522a\u9664\u7684\u6982\u5ff5<\/h2>\n<p>\u9023\u7d1a\u522a\u9664\u662f\u6307\u5728\u522a\u9664\u4e00\u689d\u8a18\u9304\u6642\uff0c\u81ea\u52d5\u522a\u9664\u8207\u4e4b\u76f8\u95dc\u7684\u5176\u4ed6\u8a18\u9304\u3002\u9019\u5728\u8655\u7406\u5177\u6709\u7236\u5b50\u95dc\u4fc2\u7684\u6578\u64da\u6642\u7279\u5225\u6709\u7528\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u500b\u96fb\u5b50\u5546\u52d9\u7cfb\u7d71\u4e2d\uff0c\u7576\u522a\u9664\u4e00\u500b\u5ba2\u6236\u6642\uff0c\u8207\u8a72\u5ba2\u6236\u76f8\u95dc\u7684\u6240\u6709\u8a02\u55ae\u4e5f\u61c9\u8a72\u88ab\u522a\u9664\uff0c\u4ee5\u4fdd\u6301\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e9%80%a3%e7%b4%9a%e5%88%aa%e9%99%a4-bcLFqUexbX\">\u5982\u4f55\u5be6\u73fe\u9023\u7d1a\u522a\u9664<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\u5be6\u73fe\u9023\u7d1a\u522a\u9664\u901a\u5e38\u6709\u5169\u7a2e\u65b9\u6cd5\uff1a\u4f7f\u7528\u5916\u9375\u7d04\u675f\u548c\u89f8\u767c\u5668\u3002<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e5%a4%96%e9%8d%b5%e7%b4%84%e6%9d%9f-bcLFqUexbX\">1. \u4f7f\u7528\u5916\u9375\u7d04\u675f<\/h3>\n<p>\u5728\u5275\u5efa\u8868\u6642\uff0c\u53ef\u4ee5\u8a2d\u7f6e\u5916\u9375\u7d04\u675f\uff0c\u4e26\u6307\u5b9a\u5728\u7236\u8868\u522a\u9664\u8a18\u9304\u6642\u81ea\u52d5\u522a\u9664\u5b50\u8868\u4e2d\u7684\u76f8\u95dc\u8a18\u9304\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE Customers (\n    CustomerID int PRIMARY KEY,\n    CustomerName varchar(255)\n);\n\nCREATE TABLE Orders (\n    OrderID int PRIMARY KEY,\n    CustomerID int,\n    FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID) ON DELETE CASCADE\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u7576\u4e00\u500b\u5ba2\u6236\u88ab\u522a\u9664\u6642\uff0c\u6240\u6709\u8207\u8a72\u5ba2\u6236\u76f8\u95dc\u7684\u8a02\u55ae\u4e5f\u6703\u81ea\u52d5\u88ab\u522a\u9664\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e8%a7%b8%e7%99%bc%e5%99%a8-bcLFqUexbX\">2. \u4f7f\u7528\u89f8\u767c\u5668<\/h3>\n<p>\u5982\u679c\u9700\u8981\u66f4\u8907\u96dc\u7684\u908f\u8f2f\uff0c\u5247\u53ef\u4ee5\u4f7f\u7528\u89f8\u767c\u5668\u4f86\u5be6\u73fe\u9023\u7d1a\u522a\u9664\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u89f8\u767c\u5668\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TRIGGER DeleteCustomerOrders\nAFTER DELETE ON Customers\nFOR EACH ROW\nBEGIN\n    DELETE FROM Orders WHERE CustomerID = OLD.CustomerID;\nEND;<\/code><\/pre>\n<p>\u9019\u500b\u89f8\u767c\u5668\u5728\u522a\u9664\u5ba2\u6236\u5f8c\u81ea\u52d5\u57f7\u884c\uff0c\u522a\u9664\u6240\u6709\u8207\u8a72\u5ba2\u6236\u76f8\u95dc\u7684\u8a02\u55ae\u3002<\/p>\n<h2 id=\"%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e5%84%aa%e7%bc%ba%e9%bb%9e-bcLFqUexbX\">\u89f8\u767c\u5668\u7684\u512a\u7f3a\u9ede<\/h2>\n<p>\u4f7f\u7528\u89f8\u767c\u5668\u4f86\u5be6\u73fe\u9023\u7d1a\u522a\u9664\u6709\u5176\u512a\u7f3a\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u512a\u9ede\uff1a<\/strong>\u89f8\u767c\u5668\u53ef\u4ee5\u5be6\u73fe\u66f4\u8907\u96dc\u7684\u908f\u8f2f\uff0c\u4e26\u4e14\u53ef\u4ee5\u5728\u591a\u500b\u8868\u4e4b\u9593\u9032\u884c\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u7f3a\u9ede\uff1a<\/strong>\u89f8\u767c\u5668\u7684\u57f7\u884c\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002\u6b64\u5916\uff0c\u904e\u591a\u7684\u89f8\u767c\u5668\u53ef\u80fd\u6703\u4f7f\u6578\u64da\u5eab\u7684\u7dad\u8b77\u8b8a\u5f97\u56f0\u96e3\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-bcLFqUexbX\">\u7d50\u8ad6<\/h2>\n<p>\u6578\u64da\u5eab\u89f8\u767c\u5668\u548c\u9023\u7d1a\u522a\u9664\u662f\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u91cd\u8981\u5de5\u5177\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u9019\u4e9b\u6280\u8853\uff0c\u4f01\u696d\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\uff0c\u5f9e\u800c\u63d0\u9ad8\u696d\u52d9\u904b\u71df\u7684\u6548\u7387\u3002\u5728\u9078\u64c7\u4f7f\u7528\u89f8\u767c\u5668\u6216\u5916\u9375\u7d04\u675f\u6642\uff0c\u61c9\u6839\u64da\u5177\u9ad4\u9700\u6c42\u548c\u6578\u64da\u5eab\u7684\u6027\u80fd\u8003\u91cf\u505a\u51fa\u660e\u667a\u7684\u6c7a\u7b56\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc\u6578\u64da\u7ba1\u7406\u548c\u6578\u64da\u5eab\u6280\u8853\u7684\u4fe1\u606f\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\u5e6b\u52a9\u60a8\u5be6\u73fe\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u4e86\u89e3\u6578\u64da\u5eab\u89f8\u767c\u5668\u9023\u7d1a\u522a\u9664\uff0c\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u7ba1\u7406\uff0c\u512a\u5316\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b8c\u6574\u6027\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\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-183262","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183262","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=183262"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183262\/revisions"}],"predecessor-version":[{"id":183263,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183262\/revisions\/183263"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=183262"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=183262"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=183262"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}