{"id":160699,"date":"2024-11-04T00:16:22","date_gmt":"2024-11-03T16:16:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160699\/"},"modified":"2024-11-04T00:16:23","modified_gmt":"2024-11-03T16:16:23","slug":"sqlite-%e6%95%99%e7%a8%8b%ef%bc%9asqlite-%e8%a7%b8%e7%99%bc%e5%99%a8%ef%bc%88trigger%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160699\/","title":{"rendered":"SQLITE \u6559\u7a0b\uff1aSQLite \u89f8\u767c\u5668\uff08Trigger\uff09"},"content":{"rendered":"<h1 id=\"sqlite-%e6%95%99%e7%a8%8b%ef%bc%9asqlite-%e8%a7%b8%e7%99%bc%e5%99%a8%ef%bc%88trigger%ef%bc%89-bZZBZymhnS\">SQLITE \u6559\u7a0b\uff1aSQLite \u89f8\u767c\u5668\uff08Trigger\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u89f8\u767c\u5668\uff08Trigger\uff09\u662f\u4e00\u7a2e\u81ea\u52d5\u57f7\u884c\u7684\u7a0b\u5e8f\uff0c\u7576\u7279\u5b9a\u4e8b\u4ef6\u767c\u751f\u6642\uff08\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\uff09\uff0c\u89f8\u767c\u5668\u6703\u81ea\u52d5\u57f7\u884c\u9810\u5b9a\u7fa9\u7684 SQL \u8a9e\u53e5\u3002SQLite \u4f5c\u70ba\u4e00\u500b\u8f15\u91cf\u7d1a\u7684\u8cc7\u6599\u5eab\u5f15\u64ce\uff0c\u652f\u6301\u89f8\u767c\u5668\u7684\u4f7f\u7528\uff0c\u9019\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u5728\u8cc7\u6599\u5eab\u5c64\u9762\u4e0a\u5be6\u73fe\u81ea\u52d5\u5316\u7684\u6578\u64da\u8655\u7406\u3002<\/p>\n<h2 id=\"%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-bZZBZymhnS\">\u89f8\u767c\u5668\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u89f8\u767c\u5668\u901a\u5e38\u8207\u8868\u683c\uff08Table\uff09\u76f8\u95dc\u806f\uff0c\u4e26\u5728\u4ee5\u4e0b\u4e09\u7a2e\u4e8b\u4ef6\u4e2d\u89f8\u767c\uff1a<\/p>\n<ul>\n<li><strong>INSERT\uff1a<\/strong>\u7576\u6709\u65b0\u8a18\u9304\u63d2\u5165\u5230\u8868\u683c\u6642\u89f8\u767c\u3002<\/li>\n<li><strong>UPDATE\uff1a<\/strong>\u7576\u5df2\u6709\u8a18\u9304\u88ab\u66f4\u65b0\u6642\u89f8\u767c\u3002<\/li>\n<li><strong>DELETE\uff1a<\/strong>\u7576\u8a18\u9304\u88ab\u522a\u9664\u6642\u89f8\u767c\u3002<\/li>\n<\/ul>\n<p>\u89f8\u767c\u5668\u7684\u4e3b\u8981\u7528\u9014\u5305\u62ec\u6578\u64da\u9a57\u8b49\u3001\u81ea\u52d5\u8a08\u7b97\u3001\u65e5\u8a8c\u8a18\u9304\u7b49\u3002\u900f\u904e\u4f7f\u7528\u89f8\u767c\u5668\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6e1b\u5c11\u61c9\u7528\u7a0b\u5f0f\u5c64\u9762\u7684\u908f\u8f2f\uff0c\u5c07\u90e8\u5206\u696d\u52d9\u908f\u8f2f\u76f4\u63a5\u653e\u5728\u8cc7\u6599\u5eab\u4e2d\u57f7\u884c\u3002<\/p>\n<h2 id=\"%e5%89%b5%e5%bb%ba%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e8%aa%9e%e6%b3%95-bZZBZymhnS\">\u5275\u5efa\u89f8\u767c\u5668\u7684\u8a9e\u6cd5<\/h2>\n<p>\u5728 SQLite \u4e2d\uff0c\u5275\u5efa\u89f8\u767c\u5668\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>\nCREATE TRIGGER trigger_name\nAFTER|BEFORE INSERT|UPDATE|DELETE\nON table_name\nFOR EACH ROW\nBEGIN\n    -- SQL \u8a9e\u53e5\nEND;\n<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>trigger_name<\/code> \u662f\u89f8\u767c\u5668\u7684\u540d\u7a31\uff0c<code>AFTER<\/code> \u6216 <code>BEFORE<\/code> \u6307\u5b9a\u89f8\u767c\u5668\u7684\u57f7\u884c\u6642\u6a5f\uff0c<code>INSERT<\/code>\u3001<code>UPDATE<\/code> \u6216 <code>DELETE<\/code> \u6307\u5b9a\u89f8\u767c\u7684\u4e8b\u4ef6\uff0c<code>table_name<\/code> \u662f\u8207\u4e4b\u95dc\u806f\u7684\u8868\u683c\u540d\u7a31\u3002<\/p>\n<h2 id=\"%e7%af%84%e4%be%8b%ef%bc%9a%e5%89%b5%e5%bb%ba%e4%b8%80%e5%80%8b%e7%b0%a1%e5%96%ae%e7%9a%84%e8%a7%b8%e7%99%bc%e5%99%a8-bZZBZymhnS\">\u7bc4\u4f8b\uff1a\u5275\u5efa\u4e00\u500b\u7c21\u55ae\u7684\u89f8\u767c\u5668<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\u683c\uff0c\u8a72\u8868\u683c\u5305\u542b\u54e1\u5de5\u7684\u57fa\u672c\u4fe1\u606f\u3002\u6211\u5011\u5e0c\u671b\u5728\u6bcf\u6b21\u63d2\u5165\u65b0\u54e1\u5de5\u8a18\u9304\u6642\uff0c\u81ea\u52d5\u8a18\u9304\u63d2\u5165\u7684\u6642\u9593\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\u5275\u5efa\u89f8\u767c\u5668\uff1a<\/p>\n<pre><code>\nCREATE TABLE employees (\n    id INTEGER PRIMARY KEY,\n    name TEXT NOT NULL,\n    created_at DATETIME DEFAULT CURRENT_TIMESTAMP\n);\n\nCREATE TRIGGER log_employee_insert\nAFTER INSERT ON employees\nFOR EACH ROW\nBEGIN\n    INSERT INTO employee_log (employee_id, action, timestamp)\n    VALUES (NEW.id, 'insert', CURRENT_TIMESTAMP);\nEND;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5275\u5efa\u4e86\u4e00\u500b <code>employees<\/code> \u8868\u683c\uff0c\u7136\u5f8c\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba <code>log_employee_insert<\/code> \u7684\u89f8\u767c\u5668\u3002\u6bcf\u7576\u6709\u65b0\u54e1\u5de5\u63d2\u5165\u6642\uff0c\u89f8\u767c\u5668\u6703\u81ea\u52d5\u5c07\u8a72\u54e1\u5de5\u7684 ID\u3001\u64cd\u4f5c\u985e\u578b\u548c\u7576\u524d\u6642\u9593\u63d2\u5165\u5230 <code>employee_log<\/code> \u8868\u683c\u4e2d\u3002<\/p>\n<h2 id=\"%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e7%ae%a1%e7%90%86-bZZBZymhnS\">\u89f8\u767c\u5668\u7684\u7ba1\u7406<\/h2>\n<p>\u5728 SQLite \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\u4f86\u522a\u9664\u89f8\u767c\u5668\uff1a<\/p>\n<pre><code>\nDROP TRIGGER trigger_name;\n<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u7dad\u8b77\u8cc7\u6599\u5eab\u4e2d\u7684\u89f8\u767c\u5668\uff0c\u78ba\u4fdd\u5176\u904b\u884c\u7684\u6709\u6548\u6027\u548c\u5fc5\u8981\u6027\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-bZZBZymhnS\">\u7e3d\u7d50<\/h2>\n<p>SQLite \u7684\u89f8\u767c\u5668\u529f\u80fd\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5728\u8cc7\u6599\u5eab\u5c64\u9762\u4e0a\u81ea\u52d5\u57f7\u884c\u7279\u5b9a\u64cd\u4f5c\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u548c\u4e00\u81f4\u6027\u3002\u900f\u904e\u5408\u7406\u5730\u4f7f\u7528\u89f8\u767c\u5668\uff0c\u53ef\u4ee5\u7c21\u5316\u61c9\u7528\u7a0b\u5f0f\u7684\u908f\u8f2f\uff0c\u4e26\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u6e96\u78ba\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684 SQLite \u8cc7\u6599\u5eab\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f\u5176\u4ed6\u96f2\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728SQLite\u4e2d\u4f7f\u7528\u89f8\u767c\u5668\uff08Trigger\uff09\uff0c\u81ea\u52d5\u57f7\u884c\u64cd\u4f5c\u4ee5\u589e\u5f37\u6578\u64da\u5eab\u7684\u529f\u80fd\u548c\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-160699","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160699","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=160699"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160699\/revisions"}],"predecessor-version":[{"id":160700,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160699\/revisions\/160700"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160699"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160699"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160699"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}