{"id":200040,"date":"2025-05-06T08:36:55","date_gmt":"2025-05-06T00:36:55","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200040\/"},"modified":"2025-05-06T08:36:55","modified_gmt":"2025-05-06T00:36:55","slug":"mysql%e6%98%af%e5%90%a6%e5%85%b7%e6%9c%89%e7%b1%bb%e4%bc%bc%e4%ba%8epl-sql%e7%9a%84%e5%8a%9f%e8%83%bd%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200040\/","title":{"rendered":"MySQL\u662f\u5426\u5177\u6709\u7c7b\u4f3c\u4e8ePL\/SQL\u7684\u529f\u80fd\uff1f"},"content":{"rendered":"

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

MySQL\u662f\u5426\u5177\u6709\u7c7b\u4f3c\u4e8ePL\/SQL\u7684\u529f\u80fd\uff1f<\/h1>\n

\u76ee\u524d\u4e3b\u673a\u5b9d\u8d1d\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u5173\u4e8e\u7684\u6587\u7ae0\u4e86\uff0c\u81ea\u5df1\u5728\u521d\u6b21\u9605\u8bfb\u8fd9\u4e9b\u6587\u7ae0\u4e2d\uff0c\u4e5f\u89c1\u8bc6\u5230\u4e86\u5f88\u591a\u5b66\u4e60\u601d\u8def\uff1b\u90a3\u4e48\u672c\u6587\uff0c\u4e5f\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u5982\u679c\u9605\u8bfb\u5b8c\u540e\u771f\u7684\u5bf9\u4f60\u5b66\u4e60\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u52a8\u52a8\u624b\u6307\uff0c\u8bc4\u8bba\u7559\u8a00\u5e76\u5206\u4eab~<\/p>\n

MySQL\u662f\u5426\u652f\u6301\u7c7b\u4f3cPL\/SQL\u7684\u529f\u80fd\uff0c\u9700\u8981\u5177\u4f53\u4ee3\u7801\u793a\u4f8b<\/h2>\n

MySQL\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5404\u79cd\u7c7b\u578b\u7684\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u4e2d\u3002\u4e0eOracle\u7684PL\/SQL\u76f8\u6bd4\uff0cMySQL\u5e76\u4e0d\u539f\u751f\u652f\u6301\u7c7b\u4f3c\u7684\u5b58\u50a8\u8fc7\u7a0b\u548c\u89e6\u53d1\u5668\u7b49\u529f\u80fd\u3002\u5c3d\u7ba1MySQL\u5185\u7f6e\u4e86\u5b58\u50a8\u8fc7\u7a0b\u3001\u89e6\u53d1\u5668\u548c\u51fd\u6570\u7b49\uff0c\u5219\u5176\u8bed\u6cd5\u548c\u7528\u6cd5\u4e0ePL\/SQL\u7565\u6709\u4e0d\u540c\uff0c\u540c\u65f6\u4e5f\u53ef\u4ee5\u5b9e\u73b0\u7c7b\u4f3c\u7684\u529f\u80fd\u3002\u63a5\u4e0b\u6765\u6211\u4eec\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728MySQL\u4e2d\u5229\u7528\u5b58\u50a8\u8fc7\u7a0b\u548c\u89e6\u53d1\u5668\u5b9e\u73b0\u7c7b\u4f3cPL\/SQL\u7684\u529f\u80fd\u3002<\/p>\n

MySQL\u5b58\u50a8\u8fc7\u7a0b<\/h3>\n

MySQL\u4e2d\u7684\u5b58\u50a8\u8fc7\u7a0b\u662f\u4e00\u7cfb\u5217SQL\u8bed\u53e5\u7684\u96c6\u5408\uff0c\u53ef\u4ee5\u63a5\u53d7\u53c2\u6570\u5e76\u6267\u884c\u7279\u5b9a\u7684\u4efb\u52a1\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u7684MySQL\u5b58\u50a8\u8fc7\u7a0b\uff0c\u7528\u4e8e\u8ba1\u7b97\u4e24\u4e2a\u6570\u7684\u548c\uff1a<\/p>\n

DELIMITER $$\nCREATE PROCEDURE calculate_sum (IN num1 INT, IN num2 INT, OUT sum_result INT)\nBEGIN\n    SET sum_result = num1 + num2;\nEND$$\nDELIMITER ;<\/pre>\n
\u4ee5\u4e0a\u4ee3\u7801\u9996\u5148\u4f7f\u7528DELIMITER<\/code>\u6307\u5b9a\u8bed\u53e5\u7ed3\u675f\u7b26\u4e3a$$<\/code>\uff0c\u7136\u540e\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3acalculate_sum<\/code>\u7684\u5b58\u50a8\u8fc7\u7a0b\uff0c\u63a5\u53d7\u4e24\u4e2a\u6574\u6570\u578b\u53c2\u6570num1<\/code>\u548cnum2<\/code>\uff0c\u5e76\u8fd4\u56de\u5b83\u4eec\u7684\u548c\u5230sum_result<\/code>\u53c2\u6570\u4e2d\u3002<\/p>\n
MySQL\u89e6\u53d1\u5668<\/h3>\n
MySQL\u4e2d\u7684\u89e6\u53d1\u5668\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u5b58\u50a8\u8fc7\u7a0b\uff0c\u4e0e\u7279\u5b9a\u7684\u8868\u76f8\u5173\u8054\uff0c\u5e76\u5728\u7279\u5b9a\u4e8b\u4ef6\u53d1\u751f\u65f6\u81ea\u52a8\u89e6\u53d1\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u7684MySQL\u89e6\u53d1\u5668\uff0c\u7528\u4e8e\u5728\u5f80orders<\/code>\u8868\u63d2\u5165\u8bb0\u5f55\u65f6\u66f4\u65b0customer<\/code>\u8868\u4e2d\u7684total_orders<\/code>\u5b57\u6bb5\uff1a<\/p>\n
CREATE TRIGGER update_total_orders\nAFTER INSERT ON orders\nFOR EACH ROW\nBEGIN\n    UPDATE customer\n    SET total_orders = total_orders + 1\n    WHERE customer_id = NEW.customer_id;\nEND;<\/pre>\n
\u4ee5\u4e0a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3aupdate_total_orders<\/code>\u7684\u89e6\u53d1\u5668\uff0c\u89e6\u53d1\u4e8b\u4ef6\u4e3aorders<\/code>\u8868\u7684\u63d2\u5165\u64cd\u4f5c\u3002\u5728\u6bcf\u6b21\u5f80orders<\/code>\u8868\u63d2\u5165\u8bb0\u5f55\u540e\uff0c\u8be5\u89e6\u53d1\u5668\u4f1a\u81ea\u52a8\u5c06\u5bf9\u5e94customer<\/code>\u8868\u4e2d\u7684total_orders<\/code>\u5b57\u6bb5\u52a0\u4e00\u3002<\/p>\n
\u901a\u8fc7\u5b58\u50a8\u8fc7\u7a0b\u548c\u89e6\u53d1\u5668\u7684\u7ed3\u5408\uff0cMySQL\u80fd\u591f\u5b9e\u73b0\u7c7b\u4f3cPL\/SQL\u7684\u529f\u80fd\uff0c\u65b9\u4fbf\u5f00\u53d1\u8005\u5728\u6570\u636e\u5e93\u5c42\u9762\u8fdb\u884c\u66f4\u52a0\u590d\u6742\u7684\u903b\u8f91\u5904\u7406\uff0c\u63d0\u9ad8\u6570\u636e\u5904\u7406\u7684\u6548\u7387\u548c\u7075\u6d3b\u6027\u3002<\/p>\n
\u603b\u7684\u6765\u8bf4\uff0c\u867d\u7136MySQL\u5e76\u4e0d\u539f\u751f\u652f\u6301\u7c7b\u4f3cPL\/SQL\u7684\u529f\u80fd\uff0c\u4f46\u901a\u8fc7\u5b58\u50a8\u8fc7\u7a0b\u548c\u89e6\u53d1\u5668\u7b49\u9ad8\u7ea7\u7279\u6027\uff0c\u6211\u4eec\u4f9d\u7136\u53ef\u4ee5\u5b9e\u73b0\u7c7b\u4f3c\u7684\u529f\u80fd\u9700\u6c42\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u60c5\u51b5\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u6765\u5904\u7406\u6570\u636e\u903b\u8f91\uff0c\u4ee5\u8fbe\u5230\u6700\u4f73\u6548\u679c\u3002<\/p>\n
\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300aMySQL\u662f\u5426\u5177\u6709\u7c7b\u4f3c\u4e8ePL\/SQL\u7684\u529f\u80fd\uff1f\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n
\n
\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
MySQL\u662f\u5426\u5177\u6709\u7c7b\u4f3c\u4e8ePL\/S...<\/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-200040","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200040","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=200040"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200040\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200040"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200040"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200040"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}