{"id":200060,"date":"2025-05-06T11:36:13","date_gmt":"2025-05-06T03:36:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200060\/"},"modified":"2025-05-06T11:36:13","modified_gmt":"2025-05-06T03:36:13","slug":"%e5%ad%a6%e4%b9%a0mysql%e8%a7%a6%e5%8f%91%e5%99%a8%e7%9a%84%e5%9f%ba%e6%9c%ac%e5%8e%9f%e7%90%86%e5%92%8c%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200060\/","title":{"rendered":"\u5b66\u4e60MySQL\u89e6\u53d1\u5668\u7684\u57fa\u672c\u539f\u7406\u548c\u529f\u80fd"},"content":{"rendered":"

<\/b> <\/p>\n

\u5b66\u4e60MySQL\u89e6\u53d1\u5668\u7684\u57fa\u672c\u539f\u7406\u548c\u529f\u80fd<\/h1>\n

MySQL\u89e6\u53d1\u5668\u662f\u4e00\u79cd\u7279\u6b8a\u7c7b\u578b\u7684\u5b58\u50a8\u8fc7\u7a0b\uff0c\u5b83\u5728\u8868\u4e0a\u5b9a\u4e49\u4e00\u7cfb\u5217\u52a8\u4f5c\uff0c\u5f53\u6ee1\u8db3\u89e6\u53d1\u6761\u4ef6\u65f6\u81ea\u52a8\u6267\u884c\u3002\u901a\u8fc7\u89e6\u53d1\u5668\uff0c\u53ef\u4ee5\u5728\u63d2\u5165\u3001\u66f4\u65b0\u3001\u5220\u9664\u7b49\u52a8\u4f5c\u53d1\u751f\u65f6\u5b9e\u73b0\u81ea\u52a8\u5316\u64cd\u4f5c\uff0c\u6bd4\u5982\u81ea\u52a8\u66f4\u65b0\u5173\u8054\u8868\u6570\u636e\u3001\u8bb0\u5f55\u4fee\u6539\u65e5\u5fd7\u3001\u8fdb\u884c\u7ea7\u8054\u64cd\u4f5c\u7b49\u3002\u89e6\u53d1\u5668\u7b80\u5316\u4e86\u4ee3\u7801\u903b\u8f91\uff0c\u51cf\u5c11\u4e86\u91cd\u590d\u64cd\u4f5c\uff0c\u63d0\u5347\u4e86\u7cfb\u7edf\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002<\/p>\n

\u4e86\u89e3MySQL\u89e6\u53d1\u5668\u7684\u57fa\u672c\u6982\u5ff5\u4e0e\u7528\u9014<\/p>\n

MySQL\u89e6\u53d1\u5668\u662f\u4e00\u79cd\u7279\u6b8a\u7c7b\u578b\u7684\u5b58\u50a8\u8fc7\u7a0b\uff0c\u5b83\u5728\u6570\u636e\u5e93\u4e2d\u7684\u8868\u4e0a\u5b9a\u4e49\u4e86\u4e00\u7cfb\u5217\u7684\u52a8\u4f5c\uff0c\u5f53\u6ee1\u8db3\u89e6\u53d1\u6761\u4ef6\u65f6\u5c31\u4f1a\u88ab\u81ea\u52a8\u6fc0\u6d3b\u6267\u884c\u3002\u901a\u8fc7\u89e6\u53d1\u5668\uff0c\u53ef\u4ee5\u5b9e\u73b0\u6570\u636e\u5e93\u8868\u7684\u81ea\u52a8\u5316\u64cd\u4f5c\uff0c\u6bd4\u5982\u5728\u63d2\u5165\u3001\u66f4\u65b0\u3001\u5220\u9664\u7b49\u52a8\u4f5c\u53d1\u751f\u65f6\u6267\u884c\u76f8\u5e94\u7684\u903b\u8f91\u3002<\/p>\n

MySQL\u89e6\u53d1\u5668\u7684\u57fa\u672c\u8bed\u6cd5\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n

CREATE TRIGGER trigger_name\n{BEFORE | AFTER} {INSERT | UPDATE | DELETE}\nON table_name\nFOR EACH ROW\nBEGIN\n-- \u89e6\u53d1\u5668\u6267\u884c\u7684\u903b\u8f91\u4ee3\u7801\nEND;<\/pre>\n
\u5728\u4e0a\u9762\u7684\u8bed\u6cd5\u7ed3\u6784\u4e2d\uff0c\u89e6\u53d1\u5668\u7684\u540d\u79f0\u7531trigger_name<\/code>\u6307\u5b9a\uff0c\u89e6\u53d1\u5668\u7684\u6267\u884c\u65f6\u95f4\u7531BEFORE<\/code>\u6216AFTER<\/code>\u5173\u952e\u5b57\u6307\u5b9a\uff0c\u89e6\u53d1\u7684\u52a8\u4f5c\u7531INSERT<\/code>\u3001UPDATE<\/code>\u6216DELETE<\/code>\u5173\u952e\u5b57\u6307\u5b9a\uff0c\u89e6\u53d1\u5668\u6240\u5728\u7684\u8868\u7531table_name<\/code>\u6307\u5b9a\uff0cFOR EACH ROW<\/code>\u8868\u793a\u6bcf\u4e00\u884c\u89e6\u53d1\u4e00\u6b21\uff0cBEGIN<\/code>\u548cEND<\/code>\u4e4b\u95f4\u4e3a\u89e6\u53d1\u5668\u6267\u884c\u7684\u903b\u8f91\u4ee3\u7801\u3002<\/p>\n
\u4e0b\u9762\u901a\u8fc7\u51e0\u4e2a\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u8bf4\u660eMySQL\u89e6\u53d1\u5668\u7684\u7528\u6cd5\uff1a<\/p>\n
    \n
  1. \u5728\u63d2\u5165\u6570\u636e\u65f6\u81ea\u52a8\u66f4\u65b0\u53e6\u4e00\u5f20\u5173\u8054\u8868\u7684\u6570\u636e<\/li>\n<\/ol>\n
    \u5047\u8bbe\u6709\u4e24\u5f20\u8868users<\/code>\u548clogs<\/code>\uff0c\u7528\u6237\u5728users<\/code>\u8868\u4e2d\u63d2\u5165\u65b0\u6570\u636e\u65f6\uff0c\u9700\u8981\u5728logs<\/code>\u8868\u4e2d\u81ea\u52a8\u63d2\u5165\u4e00\u6761\u76f8\u5173\u7684\u65e5\u5fd7\u8bb0\u5f55\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u89e6\u53d1\u5668\u6765\u5b9e\u73b0\uff1a<\/p>\n
    CREATE TRIGGER after_insert_user\nAFTER INSERT\nON users\nFOR EACH ROW\nBEGIN\n    INSERT INTO logs(user_id, action, timestamp)\n    VALUES(NEW.id, 'Insert user', NOW());\nEND;<\/pre>\n
      \n
    1. \u5728\u66f4\u65b0\u6570\u636e\u65f6\u8bb0\u5f55\u4fee\u6539\u65e5\u5fd7<\/li>\n<\/ol>\n
      \u5047\u8bbe\u6709\u4e00\u5f20products<\/code>\u8868\uff0c\u5f53\u66f4\u65b0\u67d0\u4e2a\u4ea7\u54c1\u7684\u4fe1\u606f\u65f6\uff0c\u9700\u8981\u8bb0\u5f55\u4e0b\u4fee\u6539\u524d\u540e\u7684\u4fe1\u606f\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u89e6\u53d1\u5668\u6765\u5b9e\u73b0\uff1a<\/p>\n
      CREATE TRIGGER after_update_product\nAFTER UPDATE\nON products\nFOR EACH ROW\nBEGIN\n    INSERT INTO product_logs(product_id, old_name, new_name, old_price, new_price, timestamp)\n    VALUES(NEW.id, OLD.name, NEW.name, OLD.price, NEW.price, NOW());\nEND;<\/pre>\n
        \n
      1. \u5728\u5220\u9664\u6570\u636e\u65f6\u8fdb\u884c\u7ea7\u8054\u64cd\u4f5c<\/li>\n<\/ol>\n
        \u5047\u8bbe\u6709\u4e24\u5f20\u8868orders<\/code>\u548corder_details<\/code>\uff0c\u5f53\u5220\u9664\u67d0\u4e2a\u8ba2\u5355\u65f6\uff0c\u9700\u8981\u7ea7\u8054\u5220\u9664\u5bf9\u5e94\u7684\u8ba2\u5355\u8be6\u60c5\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u89e6\u53d1\u5668\u6765\u5b9e\u73b0\uff1a<\/p>\n
        CREATE TRIGGER after_delete_order\nAFTER DELETE\nON orders\nFOR EACH ROW\nBEGIN\n    DELETE FROM order_details WHERE order_id = OLD.id;\nEND;<\/pre>\n
        \u901a\u8fc7\u4ee5\u4e0a\u51e0\u4e2a\u793a\u4f8b\uff0c\u53ef\u4ee5\u770b\u5230MySQL\u89e6\u53d1\u5668\u7684\u4f5c\u7528\u548c\u7528\u9014\u3002\u89e6\u53d1\u5668\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5728\u6570\u636e\u5e93\u64cd\u4f5c\u65f6\u5b9e\u73b0\u81ea\u52a8\u5316\u7684\u4e1a\u52a1\u903b\u8f91\uff0c\u63d0\u9ad8\u6570\u636e\u5e93\u7684\u53ef\u9760\u6027\u548c\u6548\u7387\u3002\u5f53\u8bbe\u8ba1\u6570\u636e\u5e93\u65f6\uff0c\u5408\u7406\u5730\u4f7f\u7528\u89e6\u53d1\u5668\u53ef\u4ee5\u7b80\u5316\u4ee3\u7801\u903b\u8f91\uff0c\u51cf\u5c11\u91cd\u590d\u64cd\u4f5c\uff0c\u63d0\u5347\u7cfb\u7edf\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002<\/p>\n
        \u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6570\u636e\u5e93\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n
        \n
        \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
        \u5b66\u4e60MySQL\u89e6\u53d1\u5668\u7684\u57fa\u672c\u539f\u7406\u548c...<\/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-200060","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200060","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=200060"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200060\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200060"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200060"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200060"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}