{"id":179348,"date":"2024-11-09T01:04:20","date_gmt":"2024-11-08T17:04:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179348\/"},"modified":"2024-11-09T01:04:21","modified_gmt":"2024-11-08T17:04:21","slug":"%e5%a6%82%e4%bd%95%e7%94%a8%e8%a7%b8%e7%99%bc%e5%99%a8%e5%af%a6%e7%8f%be%e8%a8%98%e9%8c%84%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e5%92%8c%e8%a8%98%e9%8c%84%e6%9b%b4%e6%94%b9%e6%97%a5%e8%aa%8c%e7%9a%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179348\/","title":{"rendered":"\u5982\u4f55\u7528\u89f8\u767c\u5668\u5be6\u73fe\u8a18\u9304\u6578\u64da\u5eab\u8868\u548c\u8a18\u9304\u66f4\u6539\u65e5\u8a8c\u7684\u64cd\u4f5c"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e7%94%a8%e8%a7%b8%e7%99%bc%e5%99%a8%e5%af%a6%e7%8f%be%e8%a8%98%e9%8c%84%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e5%92%8c%e8%a8%98%e9%8c%84%e6%9b%b4%e6%94%b9%e6%97%a5%e8%aa%8c%e7%9a%84-SIKNrwdqED\">\u5982\u4f55\u7528\u89f8\u767c\u5668\u5be6\u73fe\u8a18\u9304\u6578\u64da\u5eab\u8868\u548c\u8a18\u9304\u66f4\u6539\u65e5\u8a8c\u7684\u64cd\u4f5c<\/h1>\n<p>\u5728\u73fe\u4ee3\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u53ef\u8ffd\u6eaf\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u89f8\u767c\u5668\uff08Trigger\uff09\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u6578\u64da\u5eab\u5c0d\u8c61\uff0c\u53ef\u4ee5\u5728\u7279\u5b9a\u4e8b\u4ef6\u767c\u751f\u6642\u81ea\u52d5\u57f7\u884c\u9810\u5b9a\u7684\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528\u89f8\u767c\u5668\u4f86\u8a18\u9304\u6578\u64da\u5eab\u8868\u7684\u8b8a\u66f4\uff0c\u4e26\u5be6\u73fe\u66f4\u6539\u65e5\u8a8c\u7684\u529f\u80fd\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e8%a7%b8%e7%99%bc%e5%99%a8%ef%bc%9f-SIKNrwdqED\">\u4ec0\u9ebc\u662f\u89f8\u767c\u5668\uff1f<\/h2>\n<p>\u89f8\u767c\u5668\u662f\u4e00\u7a2e\u81ea\u52d5\u57f7\u884c\u7684\u7a0b\u5e8f\uff0c\u7576\u7279\u5b9a\u7684\u6578\u64da\u5eab\u4e8b\u4ef6\uff08\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\uff09\u767c\u751f\u6642\uff0c\u89f8\u767c\u5668\u6703\u81ea\u52d5\u57f7\u884c\u3002\u89f8\u767c\u5668\u901a\u5e38\u7528\u65bc\u6578\u64da\u9a57\u8b49\u3001\u6578\u64da\u5b8c\u6574\u6027\u6aa2\u67e5\u4ee5\u53ca\u81ea\u52d5\u8a18\u9304\u8b8a\u66f4\u7b49\u5834\u666f\u3002<\/p>\n<h2 id=\"%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e9%a1%9e%e5%9e%8b-SIKNrwdqED\">\u89f8\u767c\u5668\u7684\u985e\u578b<\/h2>\n<ul>\n<li><strong>BEFORE \u89f8\u767c\u5668\uff1a<\/strong>\u5728\u57f7\u884c\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\u4e4b\u524d\u89f8\u767c\u3002<\/li>\n<li><strong>AFTER \u89f8\u767c\u5668\uff1a<\/strong>\u5728\u57f7\u884c\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\u4e4b\u5f8c\u89f8\u767c\u3002<\/li>\n<li><strong>INSTEAD OF \u89f8\u767c\u5668\uff1a<\/strong>\u7528\u65bc\u8996\u5716\uff0c\u7576\u5c0d\u8996\u5716\u57f7\u884c\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\u6642\uff0c\u89f8\u767c\u5668\u6703\u4ee3\u66ff\u9019\u4e9b\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e8%a7%b8%e7%99%bc%e5%99%a8%e8%a8%98%e9%8c%84%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e7%9a%84%e8%ae%8a%e6%9b%b4-SIKNrwdqED\">\u4f7f\u7528\u89f8\u767c\u5668\u8a18\u9304\u6578\u64da\u5eab\u8868\u7684\u8b8a\u66f4<\/h2>\n<p>\u70ba\u4e86\u8a18\u9304\u6578\u64da\u5eab\u8868\u7684\u8b8a\u66f4\uff0c\u6211\u5011\u53ef\u4ee5\u5275\u5efa\u4e00\u500b\u65e5\u8a8c\u8868\uff0c\u4e26\u5728\u6578\u64da\u8868\u767c\u751f\u8b8a\u66f4\u6642\u81ea\u52d5\u5c07\u8b8a\u66f4\u8a18\u9304\u63d2\u5165\u5230\u65e5\u8a8c\u8868\u4e2d\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528\u89f8\u767c\u5668\u4f86\u5be6\u73fe\u9019\u4e00\u529f\u80fd\u3002<\/p>\n<h3 id=\"%e6%ad%a5%e9%a9%9f-1%ef%bc%9a%e5%89%b5%e5%bb%ba%e6%97%a5%e8%aa%8c%e8%a1%a8-SIKNrwdqED\">\u6b65\u9a5f 1\uff1a\u5275\u5efa\u65e5\u8a8c\u8868<\/h3>\n<pre><code>\nCREATE TABLE change_log (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    table_name VARCHAR(255),\n    operation_type VARCHAR(50),\n    old_value TEXT,\n    new_value TEXT,\n    changed_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP\n);\n<\/code><\/pre>\n<h3 id=\"%e6%ad%a5%e9%a9%9f-2%ef%bc%9a%e5%89%b5%e5%bb%ba%e8%a7%b8%e7%99%bc%e5%99%a8-SIKNrwdqED\">\u6b65\u9a5f 2\uff1a\u5275\u5efa\u89f8\u767c\u5668<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\uff0c\u6211\u5011\u5e0c\u671b\u5728\u5c0d\u8a72\u8868\u9032\u884c\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\u6642\u8a18\u9304\u8b8a\u66f4\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u89f8\u767c\u5668\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nDELIMITER \/\/\n\nCREATE TRIGGER after_employee_insert\nAFTER INSERT ON employees\nFOR EACH ROW\nBEGIN\n    INSERT INTO change_log (table_name, operation_type, new_value)\n    VALUES ('employees', 'INSERT', NEW.name);\nEND; \/\/\n\nCREATE TRIGGER after_employee_update\nAFTER UPDATE ON employees\nFOR EACH ROW\nBEGIN\n    INSERT INTO change_log (table_name, operation_type, old_value, new_value)\n    VALUES ('employees', 'UPDATE', OLD.name, NEW.name);\nEND; \/\/\n\nCREATE TRIGGER after_employee_delete\nAFTER DELETE ON employees\nFOR EACH ROW\nBEGIN\n    INSERT INTO change_log (table_name, operation_type, old_value)\n    VALUES ('employees', 'DELETE', OLD.name);\nEND; \/\/\n\nDELIMITER ;\n<\/code><\/pre>\n<h2 id=\"%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e5%84%aa%e5%8b%a2-SIKNrwdqED\">\u89f8\u767c\u5668\u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u81ea\u52d5\u5316\uff1a<\/strong>\u89f8\u767c\u5668\u53ef\u4ee5\u81ea\u52d5\u57f7\u884c\uff0c\u6e1b\u5c11\u4e86\u624b\u52d5\u8a18\u9304\u7684\u9700\u8981\u3002<\/li>\n<li><strong>\u5373\u6642\u6027\uff1a<\/strong>\u8b8a\u66f4\u8a18\u9304\u53ef\u4ee5\u5373\u6642\u53cd\u6620\uff0c\u4fbf\u65bc\u8ffd\u8e64\u548c\u5be9\u8a08\u3002<\/li>\n<li><strong>\u6578\u64da\u5b8c\u6574\u6027\uff1a<\/strong>\u89f8\u767c\u5668\u53ef\u4ee5\u5e6b\u52a9\u7dad\u8b77\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-SIKNrwdqED\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u96d6\u7136\u89f8\u767c\u5668\u63d0\u4f9b\u4e86\u8a31\u591a\u512a\u52e2\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u4e5f\u9700\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u904e\u591a\u7684\u89f8\u767c\u5668\u53ef\u80fd\u6703\u5f71\u97ff\u6578\u64da\u5eab\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u8b39\u614e\u8a2d\u8a08\u3002<\/li>\n<li>\u89f8\u767c\u5668\u7684\u908f\u8f2f\u61c9\u7c21\u55ae\u660e\u77ad\uff0c\u4ee5\u907f\u514d\u8907\u96dc\u7684\u4f9d\u8cf4\u95dc\u4fc2\u3002<\/li>\n<li>\u5728\u9032\u884c\u6578\u64da\u5eab\u9077\u79fb\u6216\u5347\u7d1a\u6642\uff0c\u9700\u7279\u5225\u6ce8\u610f\u89f8\u767c\u5668\u7684\u517c\u5bb9\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-SIKNrwdqED\">\u7e3d\u7d50<\/h2>\n<p>\u89f8\u767c\u5668\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u81ea\u52d5\u8a18\u9304\u6578\u64da\u8b8a\u66f4\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u7684\u53ef\u8ffd\u6eaf\u6027\u548c\u5b8c\u6574\u6027\u3002\u901a\u904e\u5275\u5efa\u9069\u7576\u7684\u89f8\u767c\u5668\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u7684\u8b8a\u66f4\u65e5\u8a8c\uff0c\u70ba\u672a\u4f86\u7684\u6578\u64da\u5206\u6790\u548c\u5be9\u8a08\u63d0\u4f9b\u652f\u6301\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528\u89f8\u767c\u5668\u4f86\u8a18\u9304\u6578\u64da\u5eab\u8868\u7684\u8b8a\u66f4\uff0c\u4e26\u6709\u6548\u7ba1\u7406\u66f4\u6539\u65e5\u8a8c\uff0c\u63d0\u5347\u6578\u64da\u8ffd\u8e64\u8207\u7ba1\u7406\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-179348","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179348","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=179348"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179348\/revisions"}],"predecessor-version":[{"id":179349,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179348\/revisions\/179349"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=179348"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=179348"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=179348"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}