{"id":6322,"date":"2024-11-14T11:48:20","date_gmt":"2024-11-14T03:48:20","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6322\/"},"modified":"2024-11-14T11:48:20","modified_gmt":"2024-11-14T03:48:20","slug":"mysql%e8%a7%a6%e5%8f%91%e5%99%a8%e7%9a%84%e4%b8%89%e7%a7%8d%e8%a7%a6%e5%8f%91%e4%ba%8b%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6322\/","title":{"rendered":"mysql\u89e6\u53d1\u5668\u7684\u4e09\u79cd\u89e6\u53d1\u4e8b\u4ef6"},"content":{"rendered":"<blockquote><p>\n  mysql\u89e6\u53d1\u5668\u5728\u7279\u5b9a\u4e8b\u4ef6\u53d1\u751f\u65f6\u6267\u884c\u52a8\u4f5c\uff0c\u6709\u4e09\u79cd\u89e6\u53d1\u4e8b\u4ef6\uff1a1. before\uff1a\u5728\u64cd\u4f5c\u53d1\u751f\u524d\u89e6\u53d1\uff0c\u5141\u8bb8\u68c0\u67e5\u6570\u636e\u6216\u66f4\u65b0\u5176\u4ed6\u8868\uff1b2. after\uff1a\u5728\u64cd\u4f5c\u53d1\u751f\u540e\u89e6\u53d1\uff0c\u5141\u8bb8\u53d1\u9001\u901a\u77e5\u6216\u5206\u6790\u6570\u636e\uff1b3. instead of\uff1a\u66ff\u4ee3\u64cd\u4f5c\uff0c\u5141\u8bb8\u5b8c\u5168\u63a7\u5236\u5bf9\u8868\u7684\u4fee\u6539\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202407\/31\/2024073122365571385.jpg\" class=\"aligncenter\" title=\"mysql\u89e6\u53d1\u5668\u7684\u4e09\u79cd\u89e6\u53d1\u4e8b\u4ef6\u63d2\u56fe\" alt=\"mysql\u89e6\u53d1\u5668\u7684\u4e09\u79cd\u89e6\u53d1\u4e8b\u4ef6\u63d2\u56fe\" \/><\/p>\n<p><strong>MySQL \u89e6\u53d1\u5668\u7684\u4e09\u79cd\u89e6\u53d1\u4e8b\u4ef6<\/strong><\/p>\n<p>MySQL \u89e6\u53d1\u5668\u662f\u4e00\u79cd\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u5f53\u7279\u5b9a\u4e8b\u4ef6\u53d1\u751f\u65f6\uff0c\u5b83\u4f1a\u81ea\u52a8\u6267\u884c\u4e00\u7ec4\u9884\u5b9a\u4e49\u7684\u64cd\u4f5c\u3002\u89e6\u53d1\u5668\u6709\u4e09\u79cd\u89e6\u53d1\u4e8b\u4ef6\uff1a<\/p>\n<p><strong>1. BEFORE<\/strong><\/p>\n<p>BEFORE \u89e6\u53d1\u5668\u5728 INSERT\u3001UPDATE \u6216 DELETE \u64cd\u4f5c\u6267\u884c\u4e4b\u524d\u89e6\u53d1\u3002\u5b83\u5141\u8bb8\u5728\u4fee\u6539\u6570\u636e\u4e4b\u524d\u6267\u884c\u64cd\u4f5c\uff0c\u4f8b\u5982\u68c0\u67e5\u8f93\u5165\u6570\u636e\u3001\u66f4\u65b0\u5176\u4ed6\u8868\u6216\u8bb0\u5f55\u66f4\u6539\u5386\u53f2\u3002<\/p>\n<p><strong>2. AFTER<\/strong><\/p>\n<p>AFTER \u89e6\u53d1\u5668\u5728 INSERT\u3001UPDATE \u6216 DELETE \u64cd\u4f5c\u6267\u884c\u4e4b\u540e\u89e6\u53d1\u3002\u5b83\u5141\u8bb8\u5728\u6570\u636e\u4fee\u6539\u540e\u8fdb\u884c\u64cd\u4f5c\uff0c\u4f8b\u5982\u53d1\u9001\u7535\u5b50\u90ae\u4ef6\u901a\u77e5\u3001\u66f4\u65b0\u7f13\u5b58\u6216\u6267\u884c\u6570\u636e\u5206\u6790\u3002<\/p>\n<p><strong>3. INSTEAD OF<\/strong><\/p>\n<p>INSTEAD OF \u89e6\u53d1\u5668\u66ff\u4ee3\u4e86 INSERT\u3001UPDATE \u6216 DELETE \u64cd\u4f5c\u3002\u5b83\u5141\u8bb8\u5b8c\u5168\u63a7\u5236\u5bf9\u8868\u7684\u4fee\u6539\uff0c\u5e76\u6267\u884c\u4efb\u610f\u64cd\u4f5c\uff08\u4f8b\u5982\uff0c\u5c06\u6570\u636e\u5199\u5165\u5907\u7528\u6570\u636e\u5e93\uff09\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u89e6\u53d1\u5668\u7684\u4e09\u79cd\u89e6\u53d1\u4e8b\u4ef6\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>mysql\u89e6\u53d1\u5668\u5728\u7279\u5b9a\u4e8b\u4ef6\u53d1\u751f\u65f6\u6267\u884c\u52a8\u4f5c\uff0c\u6709\u4e09\u79cd\u89e6\u53d1\u4e8b\u4ef6\uff1a1. before\uff1a\u5728\u64cd\u4f5c\u53d1\u751f\u524d\u89e6\u53d1\uff0c\u5141\u8bb8\u68c0\u67e5\u6570\u636e\u6216\u66f4\u65b0\u5176\u4ed6\u8868\uff1b2. after\uff1a\u5728\u64cd\u4f5c\u53d1\u751f\u540e\u89e6\u53d1\uff0c\u5141\u8bb8\u53d1\u9001\u901a\u77e5\u6216\u5206\u6790\u6570\u636e\uff1b3. instead of\uff1a\u66ff\u4ee3\u64cd\u4f5c\uff0c\u5141\u8bb8\u5b8c\u5168\u63a7\u5236\u5bf9\u8868\u7684\u4fee\u6539\u3002 MySQL \u89e6\u53d1\u5668\u7684\u4e09\u79cd\u89e6\u53d1\u4e8b\u4ef6 MySQL \u89e6\u53d1\u5668\u662f\u4e00\u79cd\u6570\u636e\u5e93\u5bf9\u8c61\uff0c\u5f53\u7279\u5b9a\u4e8b\u4ef6\u53d1\u751f\u65f6\uff0c\u5b83\u4f1a\u81ea\u52a8\u6267\u884c\u4e00\u7ec4\u9884\u5b9a\u4e49\u7684\u64cd\u4f5c\u3002\u89e6\u53d1\u5668\u6709\u4e09\u79cd\u89e6\u53d1\u4e8b\u4ef6\uff1a 1. BEFORE BEFORE \u89e6\u53d1\u5668\u5728 INSERT\u3001UPDATE \u6216 DELETE \u64cd\u4f5c\u6267\u884c\u4e4b\u524d\u89e6\u53d1\u3002\u5b83\u5141\u8bb8\u5728\u4fee\u6539\u6570\u636e\u4e4b\u524d\u6267\u884c\u64cd\u4f5c\uff0c\u4f8b\u5982\u68c0\u67e5\u8f93\u5165\u6570\u636e\u3001\u66f4\u65b0\u5176\u4ed6\u8868\u6216\u8bb0\u5f55\u66f4\u6539\u5386\u53f2\u3002 2. AFTER AFTER \u89e6\u53d1\u5668\u5728 INSERT\u3001UPDATE \u6216 DELETE \u64cd\u4f5c\u6267\u884c\u4e4b\u540e\u89e6\u53d1\u3002\u5b83\u5141\u8bb8\u5728\u6570\u636e\u4fee\u6539\u540e\u8fdb\u884c\u64cd\u4f5c\uff0c\u4f8b\u5982\u53d1\u9001\u7535\u5b50\u90ae\u4ef6\u901a\u77e5\u3001\u66f4\u65b0\u7f13\u5b58\u6216\u6267\u884c\u6570\u636e\u5206\u6790\u3002 3. INSTEAD OF INSTEAD OF \u89e6\u53d1\u5668\u66ff\u4ee3\u4e86 INSERT\u3001UPDATE \u6216 DELETE \u64cd\u4f5c\u3002\u5b83\u5141\u8bb8\u5b8c\u5168\u63a7\u5236\u5bf9\u8868\u7684\u4fee\u6539\uff0c\u5e76\u6267\u884c\u4efb\u610f\u64cd\u4f5c\uff08\u4f8b\u5982\uff0c\u5c06\u6570\u636e\u5199\u5165\u5907\u7528\u6570\u636e\u5e93\uff09\u3002 \u4ee5\u4e0a\u5c31\u662f\u89e6\u53d1\u5668\u7684\u4e09\u79cd\u89e6\u53d1\u4e8b\u4ef6\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},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-6322","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6322","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=6322"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6322\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=6322"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=6322"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=6322"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}