{"id":162949,"date":"2024-11-04T19:23:18","date_gmt":"2024-11-04T11:23:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/162949\/"},"modified":"2024-11-04T19:23:19","modified_gmt":"2024-11-04T11:23:19","slug":"%e6%95%99%e6%82%a8%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8mysql%e8%a7%b8%e7%99%bc%e5%99%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/162949\/","title":{"rendered":"\u6559\u60a8\u5982\u4f55\u4f7f\u7528mysql\u89f8\u767c\u5668"},"content":{"rendered":"<h1 id=\"%e6%95%99%e6%82%a8%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8mysql%e8%a7%b8%e7%99%bc%e5%99%a8-gETrdAgsZW\">\u6559\u60a8\u5982\u4f55\u4f7f\u7528MySQL\u89f8\u767c\u5668<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u89f8\u767c\u5668\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\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\u8a0eMySQL\u89f8\u767c\u5668\u7684\u6982\u5ff5\u3001\u4f7f\u7528\u65b9\u6cd5\u53ca\u5176\u5be6\u969b\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afmysql%e8%a7%b8%e7%99%bc%e5%99%a8%ef%bc%9f-gETrdAgsZW\">\u4ec0\u9ebc\u662fMySQL\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\u9019\u4e9b\u4e8b\u4ef6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>INSERT\uff1a\u7576\u65b0\u8a18\u9304\u88ab\u63d2\u5165\u6642\u3002<\/li>\n<li>UPDATE\uff1a\u7576\u73fe\u6709\u8a18\u9304\u88ab\u66f4\u65b0\u6642\u3002<\/li>\n<li>DELETE\uff1a\u7576\u8a18\u9304\u88ab\u522a\u9664\u6642\u3002<\/li>\n<\/ul>\n<p>\u89f8\u767c\u5668\u53ef\u4ee5\u7528\u4f86\u57f7\u884c\u81ea\u52d5\u5316\u4efb\u52d9\uff0c\u4f8b\u5982\u8a18\u9304\u8b8a\u66f4\u3001\u9a57\u8b49\u6578\u64da\u6216\u7dad\u8b77\u6578\u64da\u5b8c\u6574\u6027\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%89%b5%e5%bb%bamysql%e8%a7%b8%e7%99%bc%e5%99%a8-gETrdAgsZW\">\u5982\u4f55\u5275\u5efaMySQL\u89f8\u767c\u5668<\/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\u540d\u7a31\n    FOR EACH ROW\n    BEGIN\n        -- \u89f8\u767c\u5668\u908f\u8f2f\n    END;<\/code><\/pre>\n<h3 id=\"%e7%a4%ba%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-gETrdAgsZW\">\u793a\u4f8b\uff1a\u5275\u5efa\u4e00\u500b\u7c21\u55ae\u7684\u89f8\u767c\u5668<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\uff0c\u4e26\u5e0c\u671b\u5728\u6bcf\u6b21\u63d2\u5165\u65b0\u54e1\u5de5\u6642\u81ea\u52d5\u8a18\u9304\u63d2\u5165\u7684\u6642\u9593\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u5275\u5efa\u89f8\u767c\u5668\uff1a<\/p>\n<pre><code>CREATE TRIGGER log_employee_insert\n    AFTER INSERT\n    ON employees\n    FOR EACH ROW\n    BEGIN\n        INSERT INTO employee_log (employee_id, action, action_time)\n        VALUES (NEW.id, 'INSERT', NOW());\n    END;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u7576\u6709\u65b0\u54e1\u5de5\u88ab\u63d2\u5165\u5230 <code>employees<\/code> \u8868\u4e2d\u6642\uff0c\u89f8\u767c\u5668\u6703\u81ea\u52d5\u5728 <code>employee_log<\/code> \u8868\u4e2d\u63d2\u5165\u4e00\u689d\u8a18\u9304\uff0c\u8a18\u9304\u8a72\u54e1\u5de5\u7684ID\u3001\u64cd\u4f5c\u985e\u578b\u548c\u64cd\u4f5c\u6642\u9593\u3002<\/p>\n<h2 id=\"%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e4%bd%bf%e7%94%a8%e5%a0%b4%e6%99%af-gETrdAgsZW\">\u89f8\u767c\u5668\u7684\u4f7f\u7528\u5834\u666f<\/h2>\n<p>MySQL\u89f8\u767c\u5668\u53ef\u4ee5\u61c9\u7528\u65bc\u591a\u7a2e\u5834\u666f\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u65bc\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u5b8c\u6574\u6027\uff1a<\/strong>\u78ba\u4fdd\u6578\u64da\u5728\u63d2\u5165\u6216\u66f4\u65b0\u6642\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u3002<\/li>\n<li><strong>\u5be9\u8a08\u8ddf\u8e64\uff1a<\/strong>\u8a18\u9304\u6578\u64da\u7684\u8b8a\u66f4\u6b77\u53f2\uff0c\u4ee5\u4fbf\u65e5\u5f8c\u67e5\u8a62\u3002<\/li>\n<li><strong>\u81ea\u52d5\u8a08\u7b97\uff1a<\/strong>\u5728\u6578\u64da\u8b8a\u66f4\u6642\u81ea\u52d5\u8a08\u7b97\u67d0\u4e9b\u503c\uff0c\u4f8b\u5982\u66f4\u65b0\u7e3d\u91d1\u984d\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e4%bd%bf%e7%94%a8%e8%a7%b8%e7%99%bc%e5%99%a8%e8%87%aa%e5%8b%95%e8%a8%88%e7%ae%97%e7%b8%bd%e9%87%91%e9%a1%8d-gETrdAgsZW\">\u793a\u4f8b\uff1a\u4f7f\u7528\u89f8\u767c\u5668\u81ea\u52d5\u8a08\u7b97\u7e3d\u91d1\u984d<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b <code>orders<\/code> \u8868\uff0c\u4e26\u5e0c\u671b\u5728\u6bcf\u6b21\u63d2\u5165\u65b0\u8a02\u55ae\u6642\u81ea\u52d5\u8a08\u7b97\u4e26\u66f4\u65b0 <code>total_amount<\/code> \u6b04\u4f4d\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u89f8\u767c\u5668\uff1a<\/p>\n<pre><code>CREATE TRIGGER calculate_total_amount\n    BEFORE INSERT\n    ON orders\n    FOR EACH ROW\n    BEGIN\n        SET NEW.total_amount = NEW.quantity * NEW.price;\n    END;<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u6bcf\u7576\u63d2\u5165\u65b0\u8a02\u55ae\u6642\uff0c\u89f8\u767c\u5668\u6703\u81ea\u52d5\u8a08\u7b97\u4e26\u586b\u5145 <code>total_amount<\/code> \u6b04\u4f4d\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-gETrdAgsZW\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528MySQL\u89f8\u767c\u5668\u6642\uff0c\u9700\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u89f8\u767c\u5668\u7684\u57f7\u884c\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u9ad8\u983b\u7387\u7684\u6578\u64da\u64cd\u4f5c\u4e2d\u3002<\/li>\n<li>\u907f\u514d\u5728\u89f8\u767c\u5668\u4e2d\u57f7\u884c\u904e\u65bc\u8907\u96dc\u7684\u908f\u8f2f\uff0c\u4ee5\u514d\u5c0e\u81f4\u610f\u5916\u7684\u884c\u70ba\u3002<\/li>\n<li>\u78ba\u4fdd\u89f8\u767c\u5668\u7684\u908f\u8f2f\u4e0d\u6703\u5c0e\u81f4\u7121\u9650\u5faa\u74b0\uff0c\u4f8b\u5982\u5728\u89f8\u767c\u5668\u5167\u90e8\u518d\u6b21\u4fee\u6539\u540c\u4e00\u8868\u7684\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-gETrdAgsZW\">\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\u63d0\u5347\u6578\u64da\u5b8c\u6574\u6027\u548c\u5be9\u8a08\u80fd\u529b\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u89f8\u767c\u5668\uff0c\u60a8\u53ef\u4ee5\u7c21\u5316\u6578\u64da\u7ba1\u7406\u6d41\u7a0b\uff0c\u6e1b\u5c11\u624b\u52d5\u64cd\u4f5c\u7684\u932f\u8aa4\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u60a8\u7684\u9805\u76ee\u4e2d\u4f7f\u7528\u89f8\u767c\u5668\uff0c\u6216\u5c0b\u627e\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528MySQL\u89f8\u767c\u5668\uff0c\u81ea\u52d5\u5316\u6578\u64da\u8655\u7406\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6548\u7387\u8207\u4e00\u81f4\u6027\uff0c\u7c21\u5316\u958b\u767c\u6d41\u7a0b\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-162949","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162949","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=162949"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162949\/revisions"}],"predecessor-version":[{"id":162950,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162949\/revisions\/162950"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=162949"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=162949"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=162949"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}