{"id":75140,"date":"2024-10-15T23:20:16","date_gmt":"2024-10-15T15:20:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75140\/"},"modified":"2024-10-15T23:20:16","modified_gmt":"2024-10-15T15:20:16","slug":"mysql-%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e5%af%a6%e4%be%8b%e6%bc%94%e7%a4%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75140\/","title":{"rendered":"MySQL \u89f8\u767c\u5668\u7684\u5be6\u4f8b\u6f14\u793a"},"content":{"rendered":"<h1 id=\"mysql-%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e5%af%a6%e4%be%8b%e6%bc%94%e7%a4%ba-HRvaTpEyDj\">MySQL \u89f8\u767c\u5668\u7684\u5be6\u4f8b\u6f14\u793a<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL \u89f8\u767c\u5668\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u81ea\u52d5\u57f7\u884c\u7279\u5b9a\u64cd\u4f5c\uff0c\u7576\u67d0\u4e9b\u4e8b\u4ef6\u767c\u751f\u6642\uff08\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\uff09\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e MySQL \u89f8\u767c\u5668\u7684\u6982\u5ff5\uff0c\u4e26\u901a\u904e\u5be6\u4f8b\u6f14\u793a\u5176\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-mysql-%e8%a7%b8%e7%99%bc%e5%99%a8%ef%bc%9f-HRvaTpEyDj\">\u4ec0\u9ebc\u662f MySQL \u89f8\u767c\u5668\uff1f<\/h2>\n<p>MySQL \u89f8\u767c\u5668\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u5b58\u5132\u7a0b\u5e8f\uff0c\u5b83\u5728\u7279\u5b9a\u7684\u6578\u64da\u5eab\u4e8b\u4ef6\u767c\u751f\u6642\u81ea\u52d5\u57f7\u884c\u3002\u89f8\u767c\u5668\u53ef\u4ee5\u7528\u4f86\u5f37\u5236\u57f7\u884c\u5546\u696d\u898f\u5247\u3001\u8a18\u9304\u8b8a\u66f4\u6216\u81ea\u52d5\u66f4\u65b0\u5176\u4ed6\u8868\u683c\u3002\u89f8\u767c\u5668\u7684\u4e3b\u8981\u7279\u9ede\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u81ea\u52d5\u57f7\u884c\uff1a\u7576\u6307\u5b9a\u7684\u4e8b\u4ef6\u767c\u751f\u6642\uff0c\u89f8\u767c\u5668\u6703\u81ea\u52d5\u57f7\u884c\u3002<\/li>\n<li>\u8207\u8868\u683c\u95dc\u806f\uff1a\u89f8\u767c\u5668\u662f\u8207\u7279\u5b9a\u8868\u683c\u95dc\u806f\u7684\uff0c\u4e26\u4e14\u53ea\u80fd\u5728\u8a72\u8868\u683c\u4e0a\u57f7\u884c\u3002<\/li>\n<li>\u652f\u6301\u591a\u7a2e\u4e8b\u4ef6\uff1a\u89f8\u767c\u5668\u53ef\u4ee5\u5728\u63d2\u5165\uff08INSERT\uff09\u3001\u66f4\u65b0\uff08UPDATE\uff09\u6216\u522a\u9664\uff08DELETE\uff09\u64cd\u4f5c\u6642\u89f8\u767c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%89%b5%e5%bb%ba-mysql-%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-HRvaTpEyDj\">\u5275\u5efa MySQL \u89f8\u767c\u5668\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5275\u5efa\u89f8\u767c\u5668\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE TRIGGER \u89f8\u767c\u5668\u540d\u7a31\n    BEFORE|AFTER INSERT|UPDATE|DELETE\n    ON \u8868\u683c\u540d\u7a31\n    FOR EACH ROW\n    BEGIN\n        -- \u89f8\u767c\u5668\u908f\u8f2f\n    END;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c\u60a8\u9700\u8981\u6307\u5b9a\u89f8\u767c\u5668\u7684\u540d\u7a31\u3001\u89f8\u767c\u7684\u6642\u6a5f\uff08BEFORE \u6216 AFTER\uff09\u3001\u4e8b\u4ef6\u985e\u578b\uff08INSERT\u3001UPDATE \u6216 DELETE\uff09\u4ee5\u53ca\u8981\u95dc\u806f\u7684\u8868\u683c\u540d\u7a31\u3002<\/p>\n<h2 id=\"%e5%af%a6%e4%be%8b%e6%bc%94%e7%a4%ba-HRvaTpEyDj\">\u5be6\u4f8b\u6f14\u793a<\/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\u6642\uff0c\u81ea\u52d5\u8a18\u9304\u63d2\u5165\u7684\u6642\u9593\u5230\u53e6\u4e00\u500b\u540d\u70ba <code>employee_log<\/code> \u7684\u8868\u683c\u4e2d\u3002<\/p>\n<h3 id=\"1-%e5%89%b5%e5%bb%ba%e8%a1%a8%e6%a0%bc-HRvaTpEyDj\">1. \u5275\u5efa\u8868\u683c<\/h3>\n<pre><code>CREATE TABLE employees (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    name VARCHAR(100),\n    position VARCHAR(100)\n);\n\nCREATE TABLE employee_log (\n    log_id INT AUTO_INCREMENT PRIMARY KEY,\n    employee_id INT,\n    action_time DATETIME\n);<\/code><\/pre>\n<h3 id=\"2-%e5%89%b5%e5%bb%ba%e8%a7%b8%e7%99%bc%e5%99%a8-HRvaTpEyDj\">2. \u5275\u5efa\u89f8\u767c\u5668<\/h3>\n<pre><code>CREATE TRIGGER after_employee_insert\n    AFTER INSERT\n    ON employees\n    FOR EACH ROW\n    BEGIN\n        INSERT INTO employee_log (employee_id, action_time)\n        VALUES (NEW.id, NOW());\n    END;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u7576\u4e00\u500b\u65b0\u54e1\u5de5\u88ab\u63d2\u5165\u5230 <code>employees<\/code> \u8868\u683c\u4e2d\u6642\uff0c\u89f8\u767c\u5668 <code>after_employee_insert<\/code> \u5c07\u81ea\u52d5\u57f7\u884c\uff0c\u4e26\u5c07\u65b0\u54e1\u5de5\u7684 ID \u548c\u7576\u524d\u6642\u9593\u63d2\u5165\u5230 <code>employee_log<\/code> \u8868\u683c\u4e2d\u3002<\/p>\n<h3 id=\"3-%e6%b8%ac%e8%a9%a6%e8%a7%b8%e7%99%bc%e5%99%a8-HRvaTpEyDj\">3. \u6e2c\u8a66\u89f8\u767c\u5668<\/h3>\n<p>\u73fe\u5728\uff0c\u6211\u5011\u53ef\u4ee5\u63d2\u5165\u4e00\u500b\u65b0\u54e1\u5de5\u4f86\u6e2c\u8a66\u89f8\u767c\u5668\uff1a<\/p>\n<pre><code>INSERT INTO employees (name, position) VALUES ('John Doe', 'Developer');<\/code><\/pre>\n<p>\u63d2\u5165\u5f8c\uff0c\u6211\u5011\u53ef\u4ee5\u67e5\u8a62 <code>employee_log<\/code> \u8868\u683c\uff0c\u78ba\u8a8d\u89f8\u767c\u5668\u662f\u5426\u6b63\u5e38\u5de5\u4f5c\uff1a<\/p>\n<pre><code>SELECT * FROM employee_log;<\/code><\/pre>\n<p>\u5982\u679c\u4e00\u5207\u6b63\u5e38\uff0c\u60a8\u61c9\u8a72\u80fd\u770b\u5230\u65b0\u63d2\u5165\u7684\u54e1\u5de5 ID \u548c\u7576\u524d\u6642\u9593\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-HRvaTpEyDj\">\u7e3d\u7d50<\/h2>\n<p>MySQL \u89f8\u767c\u5668\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u81ea\u52d5\u5316\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u901a\u904e\u4e0a\u8ff0\u5be6\u4f8b\uff0c\u6211\u5011\u5c55\u793a\u4e86\u5982\u4f55\u5275\u5efa\u548c\u4f7f\u7528\u89f8\u767c\u5668\u4f86\u8a18\u9304\u6578\u64da\u8b8a\u66f4\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u61c9\u7528\u7a0b\u5e8f\u4f86\u8aaa\uff0c\u89f8\u767c\u5668\u7121\u7591\u662f\u4e00\u500b\u4e0d\u53ef\u6216\u7f3a\u7684\u529f\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u6216\u5176\u4ed6\u6578\u64da\u5eab\u7ba1\u7406\u89e3\u6c7a\u65b9\u6848\u6709\u8208\u8da3\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 MySQL \u89f8\u767c\u5668\u7684\u5be6\u4f8b\u6f14\u793a\uff0c\u5b78\u7fd2\u5982\u4f55\u81ea\u52d5\u5316\u6578\u64da\u64cd\u4f5c\uff0c\u63d0\u5347\u6578\u64da\u5eab\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-75140","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75140","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=75140"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75140\/revisions"}],"predecessor-version":[{"id":75141,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75140\/revisions\/75141"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75140"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}