{"id":199696,"date":"2025-05-06T08:54:31","date_gmt":"2025-05-06T00:54:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199696\/"},"modified":"2025-05-06T08:54:31","modified_gmt":"2025-05-06T00:54:31","slug":"sql%e8%a7%a6%e5%8f%91%e5%99%a8%e7%9a%84%e7%b1%bb%e5%9e%8b%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199696\/","title":{"rendered":"SQL\u89e6\u53d1\u5668\u7684\u7c7b\u578b\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>SQL\u89e6\u53d1\u5668\u7684\u7c7b\u578b\u6709\u54ea\u4e9b\uff1f<\/h1>\n<p>\u5077\u5077\u52aa\u529b\uff0c\u6084\u65e0\u58f0\u606f\u5730\u53d8\u5f3a\uff0c\u7136\u540e\u60ca\u8273\u6240\u6709\u4eba\uff01\u54c8\u54c8\uff0c\u5c0f\u4f19\u4f34\u4eec\u53c8\u6765\u5b66\u4e60\u5566~\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u4e0d\u77e5\u9053\u5927\u5bb6\u5bf9\u5176\u90fd\u6709\u591a\u5c11\u4e86\u89e3\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u4e00\u8d77\u6765\u770b\u4e00\u5427\uff01\u5f53\u7136\uff0c\u975e\u5e38\u5e0c\u671b\u5927\u5bb6\u80fd\u591a\u591a\u8bc4\u8bba\uff0c\u7ed9\u51fa\u5408\u7406\u7684\u5efa\u8bae\uff0c\u6211\u4eec\u4e00\u8d77\u5b66\u4e60\uff0c\u4e00\u8d77\u8fdb\u6b65\uff01<\/p>\n<p>sql\u89e6\u53d1\u5668\u6709\u54ea\u51e0\u79cd\uff0c\u9700\u8981\u5177\u4f53\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<p>\u5728SQL\u6570\u636e\u5e93\u4e2d\uff0c\u89e6\u53d1\u5668\u662f\u4e00\u79cd\u7279\u6b8a\u7c7b\u578b\u7684\u5b58\u50a8\u8fc7\u7a0b\uff0c\u53ef\u4ee5\u5728\u6570\u636e\u5e93\u4e2d\u7684\u7279\u5b9a\u4e8b\u4ef6\u53d1\u751f\u65f6\u81ea\u52a8\u6267\u884c\u3002\u89e6\u53d1\u5668\u901a\u5e38\u7528\u4e8e\u5b9e\u73b0\u6570\u636e\u5b8c\u6574\u6027\u548c\u4e1a\u52a1\u903b\u8f91\u7ea6\u675f\u3002SQL\u89e6\u53d1\u5668\u53ef\u4ee5\u5728\u6570\u636e\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664\u65f6\u81ea\u52a8\u89e6\u53d1\uff0c\u6267\u884c\u4e00\u7cfb\u5217\u5b9a\u4e49\u597d\u7684\u64cd\u4f5c\u3002<\/p>\n<p>SQL\u89e6\u53d1\u5668\u53ef\u4ee5\u5206\u4e3a\u4ee5\u4e0b\u51e0\u79cd\u7c7b\u578b\uff1a<\/p>\n<ol>\n<li>\u63d2\u5165\u89e6\u53d1\u5668\uff08INSERT Trigger\uff09\uff1a\u5f53\u5411\u8868\u4e2d\u63d2\u5165\u65b0\u8bb0\u5f55\u65f6\u89e6\u53d1\u3002\u5982\u4e0b\u662f\u4e00\u4e2a\u63d2\u5165\u89e6\u53d1\u5668\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/li>\n<\/ol>\n<pre>CREATE TRIGGER insert_trigger\nAFTER INSERT ON table_name\nFOR EACH ROW \nBEGIN\n    -- \u63d2\u5165\u89e6\u53d1\u5668\u7684\u64cd\u4f5c\u4ee3\u7801\n    -- \u53ef\u4ee5\u5728\u6b64\u5904\u8fdb\u884c\u4e00\u4e9b\u63d2\u5165\u6570\u636e\u4e4b\u540e\u7684\u5904\u7406\uff0c\u4f8b\u5982\u63d2\u5165\u65b0\u8bb0\u5f55\u540e\u66f4\u65b0\u53e6\u4e00\u4e2a\u8868\nEND<\/pre>\n<ol>\n<li>\u66f4\u65b0\u89e6\u53d1\u5668\uff08UPDATE Trigger\uff09\uff1a\u5f53\u8868\u4e2d\u7684\u73b0\u6709\u8bb0\u5f55\u88ab\u66f4\u65b0\u65f6\u89e6\u53d1\u3002\u5982\u4e0b\u662f\u4e00\u4e2a\u66f4\u65b0\u89e6\u53d1\u5668\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/li>\n<\/ol>\n<pre>CREATE TRIGGER update_trigger\nAFTER UPDATE ON table_name\nFOR EACH ROW \nBEGIN\n    -- \u66f4\u65b0\u89e6\u53d1\u5668\u7684\u64cd\u4f5c\u4ee3\u7801\n    -- \u53ef\u4ee5\u5728\u6b64\u5904\u8fdb\u884c\u4e00\u4e9b\u8bb0\u5f55\u66f4\u65b0\u540e\u7684\u5904\u7406\uff0c\u4f8b\u5982\u66f4\u65b0\u53e6\u4e00\u4e2a\u8868\u4e2d\u7684\u76f8\u5173\u8bb0\u5f55\nEND<\/pre>\n<ol>\n<li>\u5220\u9664\u89e6\u53d1\u5668\uff08DELETE Trigger\uff09\uff1a\u5f53\u4ece\u8868\u4e2d\u5220\u9664\u8bb0\u5f55\u65f6\u89e6\u53d1\u3002\u5982\u4e0b\u662f\u4e00\u4e2a\u5220\u9664\u89e6\u53d1\u5668\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/li>\n<\/ol>\n<pre>CREATE TRIGGER delete_trigger\nAFTER DELETE ON table_name\nFOR EACH ROW \nBEGIN\n    -- \u5220\u9664\u89e6\u53d1\u5668\u7684\u64cd\u4f5c\u4ee3\u7801\n    -- \u53ef\u4ee5\u5728\u6b64\u5904\u8fdb\u884c\u4e00\u4e9b\u5220\u9664\u8bb0\u5f55\u540e\u7684\u5904\u7406\uff0c\u4f8b\u5982\u5220\u9664\u76f8\u5173\u8054\u7684\u8bb0\u5f55\u6216\u5907\u4efd\u6570\u636e\u7b49\nEND<\/pre>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u89e6\u53d1\u5668\u5728\u5b9a\u4e49\u65f6\u53ef\u4ee5\u6307\u5b9a\u5176\u89e6\u53d1\u65f6\u95f4\uff08AFTER\u6216BEFORE\uff09\u4ee5\u53ca\u89e6\u53d1\u7684\u4e8b\u4ef6\uff08INSERT\u3001UPDATE\u6216DELETE\uff09\u3002\u4f7f\u7528BEFORE\u89e6\u53d1\u5668\u53ef\u4ee5\u5728\u64cd\u4f5c\u6267\u884c\u4e4b\u524d\u8fdb\u884c\u4e00\u4e9b\u989d\u5916\u7684\u5904\u7406\u3002<\/p>\n<p>\u9664\u4e86\u4e0a\u8ff0\u793a\u4f8b\u4e2d\u7684AFTER\u89e6\u53d1\u5668\u5916\uff0c\u8fd8\u53ef\u4ee5\u521b\u5efaBEFORE\u89e6\u53d1\u5668\u3002BEFORE\u89e6\u53d1\u5668\u5728\u6267\u884c\u64cd\u4f5c\u4e4b\u524d\u88ab\u89e6\u53d1\uff0c\u53ef\u4ee5\u7528\u6765\u9a8c\u8bc1\u6570\u636e\u7684\u5408\u6cd5\u6027\u6216\u8fdb\u884c\u4e00\u4e9b\u9884\u5904\u7406\u64cd\u4f5c\u3002<\/p>\n<p>\u603b\u7ed3\u6765\u8bf4\uff0cSQL\u89e6\u53d1\u5668\u53ef\u7528\u4e8e\u5728\u6570\u636e\u5e93\u7684\u7279\u5b9a\u4e8b\u4ef6\u53d1\u751f\u65f6\u81ea\u52a8\u6267\u884c\u4e00\u4e9b\u64cd\u4f5c\uff0c\u4ee5\u6ee1\u8db3\u6570\u636e\u5b8c\u6574\u6027\u3001\u4e1a\u52a1\u903b\u8f91\u7ea6\u675f\u7b49\u9700\u6c42\u3002\u6839\u636e\u4e0d\u540c\u7684\u9700\u6c42\u548c\u573a\u666f\uff0c\u53ef\u4ee5\u521b\u5efa\u63d2\u5165\u89e6\u53d1\u5668\u3001\u66f4\u65b0\u89e6\u53d1\u5668\u4ee5\u53ca\u5220\u9664\u89e6\u53d1\u5668\u3002\u901a\u8fc7\u5b9a\u4e49\u5408\u9002\u7684\u89e6\u53d1\u5668\uff0c\u53ef\u4ee5\u5728\u6570\u636e\u5e93\u64cd\u4f5c\u8fc7\u7a0b\u4e2d\u5b9e\u73b0\u66f4\u7cbe\u7ec6\u7684\u63a7\u5236\u548c\u5904\u7406\u3002<\/p>\n<p>\u4ee5\u4e0a\u662f\u5173\u4e8eSQL\u89e6\u53d1\u5668\u79cd\u7c7b\u4ee5\u53ca\u76f8\u5e94\u4ee3\u7801\u793a\u4f8b\u7684\u4ecb\u7ecd\u3002<\/p>\n<p>\u672c\u7bc7\u5173\u4e8e\u300aSQL\u89e6\u53d1\u5668\u7684\u7c7b\u578b\u6709\u54ea\u4e9b\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6570\u636e\u5e93\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>SQL\u89e6\u53d1\u5668\u7684\u7c7b\u578b\u6709\u54ea\u4e9b\uff1f \u5077\u5077&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-199696","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199696","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=199696"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199696\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199696"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199696"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199696"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}