{"id":5893,"date":"2024-11-14T08:08:27","date_gmt":"2024-11-14T00:08:27","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5893\/"},"modified":"2024-11-14T08:08:27","modified_gmt":"2024-11-14T00:08:27","slug":"sql%e8%a7%a6%e5%8f%91%e5%99%a8%e6%80%8e%e4%b9%88%e8%ae%be%e7%bd%ae","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5893\/","title":{"rendered":"sql\u89e6\u53d1\u5668\u600e\u4e48\u8bbe\u7f6e"},"content":{"rendered":"<blockquote><p>\n  sql \u89e6\u53d1\u5668\u662f\u4e00\u79cd\u5728\u6307\u5b9a\u8868\u4e0a\u6267\u884c\u7279\u5b9a\u4e8b\u4ef6\u65f6\u81ea\u52a8\u6267\u884c\u7279\u5b9a\u64cd\u4f5c\u7684\u6570\u636e\u5e93\u5bf9\u8c61\u3002\u8981\u8bbe\u7f6e sql \u89e6\u53d1\u5668\uff0c\u53ef\u4ee5\u4f7f\u7528 create trigger \u8bed\u53e5\uff0c\u5176\u4e2d\u5305\u62ec\u89e6\u53d1\u5668\u540d\u79f0\u3001\u8868\u540d\u79f0\u3001\u4e8b\u4ef6\u7c7b\u578b\u548c\u89e6\u53d1\u5668\u4ee3\u7801\u3002\u89e6\u53d1\u5668\u4ee3\u7801\u4f7f\u7528 as \u5173\u952e\u5b57\u8fdb\u884c\u5b9a\u4e49\uff0c\u5e76\u5305\u542b sql \u6216 pl\/sql \u8bed\u53e5\u6216\u5757\u3002\u901a\u8fc7\u6307\u5b9a\u89e6\u53d1\u5668\u6761\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528 where \u5b50\u53e5\u9650\u5236\u89e6\u53d1\u5668\u7684\u6267\u884c\u8303\u56f4\u3002\u53ef\u4ee5\u4f7f\u7528 insert into\u3001update \u6216 delete \u8bed\u53e5\u5728\u89e6\u53d1\u5668\u4ee3\u7801\u4e2d\u6267\u884c\u89e6\u53d1\u5668\u64cd\u4f5c\u3002new \u548c old \u5173\u952e\u5b57\u53ef\u4ee5\u5728\u89e6\u53d1\u5668\u4ee3\u7801\u4e2d\u7528\u6765\u5f15\u7528\u53d7\u5f71\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202406\/03\/2024060321512087978.jpg\" class=\"aligncenter\" title=\"sql\u89e6\u53d1\u5668\u600e\u4e48\u8bbe\u7f6e\u63d2\u56fe\" alt=\"sql\u89e6\u53d1\u5668\u600e\u4e48\u8bbe\u7f6e\u63d2\u56fe\" \/><\/p>\n<p><strong>SQL \u89e6\u53d1\u5668\u7684\u8bbe\u7f6e\u65b9\u6cd5<\/strong><\/p>\n<p><strong>1. \u4ec0\u4e48\u662f SQL \u89e6\u53d1\u5668\uff1f<\/strong><\/p>\n<p>SQL \u89e6\u53d1\u5668\u662f\u4e00\u79cd\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u5f53\u5bf9\u6307\u5b9a\u8868\u6267\u884c\u7279\u5b9a\u7684\u4e8b\u4ef6\u65f6\u81ea\u52a8\u6267\u884c\u7279\u5b9a\u64cd\u4f5c\u3002\u5b83\u7528\u4e8e\u7ef4\u62a4\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002<\/p>\n<p><strong>2. \u5982\u4f55\u8bbe\u7f6e SQL \u89e6\u53d1\u5668<\/strong><\/p>\n<p>\u521b\u5efa\u89e6\u53d1\u5668\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>CREATE TRIGGER `\u89e6\u53d1\u5668\u540d\u79f0`\nON `\u8868\u540d\u79f0`\nFOR `\u4e8b\u4ef6\u7c7b\u578b`\nAS\n`\u89e6\u53d1\u5668\u4ee3\u7801`;<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li> <strong>\u89e6\u53d1\u5668\u540d\u79f0\uff1a<\/strong>\u89e6\u53d1\u5668\u7684\u552f\u4e00\u540d\u79f0\u3002<\/li>\n<li> <strong>\u8868\u540d\u79f0\uff1a<\/strong>\u5e94\u7528\u89e6\u53d1\u5668\u7684\u8868\u3002<\/li>\n<li> <strong>\u4e8b\u4ef6\u7c7b\u578b\uff1a<\/strong>\u89e6\u53d1\u89e6\u53d1\u5668\u7684\u4e8b\u4ef6\uff0c\u4f8b\u5982 INSERT\u3001UPDATE \u6216 DELETE\u3002<\/li>\n<li> <strong>\u89e6\u53d1\u5668\u4ee3\u7801\uff1a<\/strong>\u5f53\u89e6\u53d1\u4e8b\u4ef6\u53d1\u751f\u540e\u6267\u884c\u7684 SQL \u8bed\u53e5\u6216 PL\/SQL \u4ee3\u7801\u5757\u3002<\/li>\n<\/ul>\n<p><strong>3. \u8be6\u7ec6\u6b65\u9aa4<\/strong><\/p>\n<ol>\n<li>\u4f7f\u7528 CREATE TRIGGER \u8bed\u53e5\u521b\u5efa\u89e6\u53d1\u5668\u3002<\/li>\n<li>\u6307\u5b9a\u5728\u54ea\u4e2a\u8868\u4e0a\u521b\u5efa\u89e6\u53d1\u5668\uff0c\u4ee5\u53ca\u89e6\u53d1\u54ea\u79cd\u4e8b\u4ef6\u3002<\/li>\n<li>\u4f7f\u7528 AS \u5173\u952e\u5b57\u540e\u63a5 SQL \u6216 PL\/SQL \u4ee3\u7801\u5757\u3002<\/li>\n<li>\u4f7f\u7528 BEGIN \u548c END \u8bed\u53e5\u5c01\u88c5\u89e6\u53d1\u5668\u4ee3\u7801\u3002<\/li>\n<li>\u6307\u5b9a\u89e6\u53d1\u5668\u6761\u4ef6\uff0c\u4f8b\u5982 WHERE \u5b50\u53e5\uff0c\u4ee5\u9650\u5236\u89e6\u53d1\u5668\u7684\u6267\u884c\u67d0\u4e9b\u884c\u3002<\/li>\n<li>\u4f7f\u7528 INSERT INTO\u3001UPDATE \u6216 DELETE \u8bed\u53e5\u6765\u6267\u884c\u89e6\u53d1\u5668\u64cd\u4f5c\u3002<\/li>\n<li>\u5728\u89e6\u53d1\u5668\u4ee3\u7801\u4e2d\u4f7f\u7528 NEW \u548c OLD \u5173\u952e\u5b57\u6765\u5f15\u7528\u53d7\u5f71\u54cd\u884c\u7684\u503c\u3002<\/li>\n<li>\u4f7f\u7528 COMMIT \u8bed\u53e5\u63d0\u4ea4\u4e8b\u52a1\u4ee5\u6fc0\u6d3b\u89e6\u53d1\u5668\u3002<\/li>\n<\/ol>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>-- \u521b\u5efa\u4e00\u4e2a\u5728\u8868 \"orders\" \u4e0a\u63d2\u5165\u8bb0\u5f55\u65f6\u6267\u884c\u7684\u89e6\u53d1\u5668\nCREATE TRIGGER `order_trigger`\nON `orders`\nFOR INSERT\nAS\n    -- \u63d2\u5165\u65b0\u884c\u5230 \"order_log\" \u8868\n    INSERT INTO `order_log` (`order_id`, `order_date`, `action`)\n    VALUES (NEW.`order_id`, NEW.`order_date`, 'INSERTED');<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fsql\u89e6\u53d1\u5668\u600e\u4e48\u8bbe\u7f6e\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>sql \u89e6\u53d1\u5668\u662f\u4e00\u79cd\u5728\u6307\u5b9a\u8868\u4e0a\u6267\u884c\u7279\u5b9a\u4e8b\u4ef6\u65f6\u81ea\u52a8\u6267\u884c\u7279\u5b9a\u64cd\u4f5c\u7684\u6570\u636e\u5e93\u5bf9\u8c61\u3002\u8981\u8bbe\u7f6e sql \u89e6\u53d1\u5668\uff0c\u53ef\u4ee5\u4f7f\u7528 create trigger \u8bed\u53e5\uff0c\u5176\u4e2d\u5305\u62ec\u89e6\u53d1\u5668\u540d\u79f0\u3001\u8868\u540d\u79f0\u3001\u4e8b\u4ef6\u7c7b\u578b\u548c\u89e6\u53d1\u5668\u4ee3\u7801\u3002\u89e6\u53d1\u5668\u4ee3\u7801\u4f7f\u7528 as \u5173\u952e\u5b57\u8fdb\u884c\u5b9a\u4e49\uff0c\u5e76\u5305\u542b sql \u6216 pl\/sql \u8bed\u53e5\u6216\u5757\u3002\u901a\u8fc7\u6307\u5b9a\u89e6\u53d1\u5668\u6761\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528 where \u5b50\u53e5\u9650\u5236\u89e6\u53d1\u5668\u7684\u6267\u884c\u8303\u56f4\u3002\u53ef\u4ee5\u4f7f\u7528 insert into\u3001update \u6216 delete \u8bed\u53e5\u5728\u89e6\u53d1\u5668\u4ee3\u7801\u4e2d\u6267\u884c\u89e6\u53d1\u5668\u64cd\u4f5c\u3002new \u548c old \u5173\u952e\u5b57\u53ef\u4ee5\u5728\u89e6\u53d1\u5668\u4ee3\u7801\u4e2d\u7528\u6765\u5f15\u7528\u53d7\u5f71 SQL \u89e6\u53d1\u5668\u7684\u8bbe\u7f6e\u65b9\u6cd5 1. \u4ec0\u4e48\u662f SQL \u89e6\u53d1\u5668\uff1f SQL \u89e6\u53d1\u5668\u662f\u4e00\u79cd\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u5f53\u5bf9\u6307\u5b9a\u8868\u6267\u884c\u7279\u5b9a\u7684\u4e8b\u4ef6\u65f6\u81ea\u52a8\u6267\u884c\u7279\u5b9a\u64cd\u4f5c\u3002\u5b83\u7528\u4e8e\u7ef4\u62a4\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002 2. \u5982\u4f55\u8bbe\u7f6e SQL \u89e6\u53d1\u5668 \u521b\u5efa\u89e6\u53d1\u5668\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a CREATE TRIGGER `\u89e6\u53d1\u5668\u540d\u79f0` ON `\u8868\u540d\u79f0` FOR `\u4e8b\u4ef6\u7c7b\u578b` AS `\u89e6\u53d1\u5668\u4ee3\u7801`; \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a \u89e6\u53d1\u5668\u540d\u79f0\uff1a\u89e6\u53d1\u5668\u7684\u552f\u4e00\u540d\u79f0\u3002 \u8868\u540d\u79f0\uff1a\u5e94\u7528\u89e6\u53d1\u5668\u7684\u8868\u3002 \u4e8b\u4ef6\u7c7b\u578b\uff1a\u89e6\u53d1\u89e6\u53d1\u5668\u7684\u4e8b\u4ef6\uff0c\u4f8b\u5982 INSERT\u3001UPDATE \u6216 DELETE\u3002 \u89e6\u53d1\u5668\u4ee3\u7801\uff1a\u5f53\u89e6\u53d1\u4e8b\u4ef6\u53d1\u751f\u540e\u6267\u884c\u7684 SQL [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-5893","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5893","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=5893"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5893\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}