{"id":185290,"date":"2024-11-10T20:19:17","date_gmt":"2024-11-10T12:19:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185290\/"},"modified":"2024-11-10T20:19:18","modified_gmt":"2024-11-10T12:19:18","slug":"%e4%bd%bf%e7%94%a8sql%e8%a7%b8%e7%99%bc%e5%99%a8%e5%88%aa%e9%99%a4%e7%b4%9a%e8%81%af%e8%a8%98%e9%8c%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185290\/","title":{"rendered":"\u4f7f\u7528SQL\u89f8\u767c\u5668\u522a\u9664\u7d1a\u806f\u8a18\u9304"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8sql%e8%a7%b8%e7%99%bc%e5%99%a8%e5%88%aa%e9%99%a4%e7%b4%9a%e8%81%af%e8%a8%98%e9%8c%84-aQIlNVLpDv\">\u4f7f\u7528SQL\u89f8\u767c\u5668\u522a\u9664\u7d1a\u806f\u8a18\u9304<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0c\u7dad\u8b77\u8cc7\u6599\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u7576\u4e00\u500b\u8a18\u9304\u88ab\u522a\u9664\u6642\uff0c\u76f8\u95dc\u7684\u8a18\u9304\u4e5f\u53ef\u80fd\u9700\u8981\u88ab\u522a\u9664\uff0c\u4ee5\u907f\u514d\u8cc7\u6599\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u3002\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0cSQL\u89f8\u767c\u5668\uff08Trigger\uff09\u4fbf\u6210\u70ba\u4e86\u4e00\u500b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528SQL\u89f8\u767c\u5668\u4f86\u5be6\u73fe\u7d1a\u806f\u522a\u9664\u8a18\u9304\u7684\u529f\u80fd\u3002<\/p>\n<h2 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id=\"%e5%a6%82%e4%bd%95%e5%89%b5%e5%bb%basql%e8%a7%b8%e7%99%bc%e5%99%a8%e4%be%86%e5%af%a6%e7%8f%be%e7%b4%9a%e8%81%af%e5%88%aa%e9%99%a4-aQIlNVLpDv\">\u5982\u4f55\u5275\u5efaSQL\u89f8\u767c\u5668\u4f86\u5be6\u73fe\u7d1a\u806f\u522a\u9664<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728MySQL\u4e2d\u5275\u5efa\u4e00\u500b\u89f8\u767c\u5668\uff0c\u4ee5\u5be6\u73fe\u7576\u522a\u9664\u300c\u8a02\u55ae\u300d\u8868\u4e2d\u7684\u8a18\u9304\u6642\uff0c\u81ea\u52d5\u522a\u9664\u300c\u8a02\u55ae\u660e\u7d30\u300d\u8868\u4e2d\u7684\u76f8\u95dc\u8a18\u9304\u3002<\/p>\n<pre><code>\nCREATE TRIGGER before_order_delete\nBEFORE DELETE ON orders\nFOR EACH ROW\nBEGIN\n    DELETE FROM order_details WHERE order_id = OLD.id;\nEND;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba <code>before_order_delete<\/code> 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