{"id":76712,"date":"2024-10-16T09:12:17","date_gmt":"2024-10-16T01:12:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76712\/"},"modified":"2024-10-16T09:12:17","modified_gmt":"2024-10-16T01:12:17","slug":"mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84do%e8%aa%9e%e5%8f%a5%e7%b0%a1%e4%bb%8b-mysql%e6%95%b8%e6%93%9a%e5%ba%abdo%e8%aa%9e%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76712\/","title":{"rendered":"MySQL\u6578\u64da\u5eab\u4e2d\u7684DO\u8a9e\u53e5\u7c21\u4ecb (MySQL\u6578\u64da\u5eabDO\u8a9e\u53e5)"},"content":{"rendered":"<h1 id=\"mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84do%e8%aa%9e%e5%8f%a5%e7%b0%a1%e4%bb%8b-qCwfLoLLcO\">MySQL\u6578\u64da\u5eab\u4e2d\u7684DO\u8a9e\u53e5\u7c21\u4ecb<\/h1>\n<p>\u5728MySQL\u6578\u64da\u5eab\u4e2d\uff0cDO\u8a9e\u53e5\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u5de5\u5177\uff0c\u4e3b\u8981\u7528\u65bc\u57f7\u884c\u4e0d\u8fd4\u56de\u7d50\u679c\u96c6\u7684SQL\u8a9e\u53e5\u3002\u9019\u4f7f\u5f97DO\u8a9e\u53e5\u5728\u9700\u8981\u57f7\u884c\u67d0\u4e9b\u64cd\u4f5c\u4f46\u4e0d\u9700\u8981\u67e5\u8a62\u7d50\u679c\u7684\u60c5\u6cc1\u4e0b\uff0c\u6210\u70ba\u4e00\u500b\u7406\u60f3\u7684\u9078\u64c7\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eDO\u8a9e\u53e5\u7684\u57fa\u672c\u7528\u6cd5\u3001\u7279\u6027\u4ee5\u53ca\u5be6\u969b\u61c9\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"do%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-qCwfLoLLcO\">DO\u8a9e\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>DO\u8a9e\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DO expression;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>expression<\/code>\u53ef\u4ee5\u662f\u4efb\u4f55\u6709\u6548\u7684SQL\u8868\u9054\u5f0f\uff0c\u4f8b\u5982\u4e00\u500b\u8a08\u7b97\u3001\u4e00\u500b\u51fd\u6578\u8abf\u7528\u6216\u4e00\u500b\u66f4\u65b0\u64cd\u4f5c\u3002DO\u8a9e\u53e5\u7684\u4e3b\u8981\u7279\u9ede\u662f\u5b83\u4e0d\u6703\u8fd4\u56de\u4efb\u4f55\u7d50\u679c\u96c6\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u6bd4\u5176\u4ed6\u8a9e\u53e5\u66f4\u9ad8\u6548\u3002<\/p>\n<h2 id=\"do%e8%aa%9e%e5%8f%a5%e7%9a%84%e7%89%b9%e6%80%a7-qCwfLoLLcO\">DO\u8a9e\u53e5\u7684\u7279\u6027<\/h2>\n<ul>\n<li><strong>\u7121\u8fd4\u56de\u503c\uff1a<\/strong>DO\u8a9e\u53e5\u4e0d\u6703\u8fd4\u56de\u4efb\u4f55\u7d50\u679c\u96c6\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u57f7\u884c\u67d0\u4e9b\u64cd\u4f5c\u6642\u66f4\u52a0\u9ad8\u6548\u3002<\/li>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong>\u53ef\u4ee5\u7528\u65bc\u57f7\u884c\u5404\u7a2eSQL\u8868\u9054\u5f0f\uff0c\u5305\u62ec\u8a08\u7b97\u3001\u51fd\u6578\u8abf\u7528\u7b49\u3002<\/li>\n<li><strong>\u7c21\u55ae\u6613\u7528\uff1a<\/strong>\u8a9e\u6cd5\u7c21\u55ae\uff0c\u6613\u65bc\u7406\u89e3\u548c\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"do%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8-qCwfLoLLcO\">DO\u8a9e\u53e5\u7684\u5be6\u969b\u61c9\u7528<\/h2>\n<p>DO\u8a9e\u53e5\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u6709\u591a\u7a2e\u7528\u9014\uff0c\u4ee5\u4e0b\u662f\u5e7e\u500b\u5e38\u898b\u7684\u4f8b\u5b50\uff1a<\/p>\n<h3 id=\"1-%e5%9f%b7%e8%a1%8c%e8%a8%88%e7%ae%97-qCwfLoLLcO\">1. \u57f7\u884c\u8a08\u7b97<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u9700\u8981\u8a08\u7b97\u67d0\u500b\u503c\u4e26\u4e0d\u9700\u8981\u8fd4\u56de\u7d50\u679c\uff0c\u53ef\u4ee5\u4f7f\u7528DO\u8a9e\u53e5\u4f86\u57f7\u884c\u9019\u500b\u8a08\u7b97\uff1a<\/p>\n<pre><code>DO @total := (SELECT SUM(price) FROM orders);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u8a08\u7b97\u4e86\u6240\u6709\u8a02\u55ae\u7684\u7e3d\u50f9\u683c\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u5132\u5728\u8b8a\u91cf<code>@total<\/code>\u4e2d\uff0c\u4f46\u4e0d\u6703\u8fd4\u56de\u4efb\u4f55\u7d50\u679c\u96c6\u3002<\/p>\n<h3 id=\"2-%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a-qCwfLoLLcO\">2. \u66f4\u65b0\u6578\u64da<\/h3>\n<p>DO\u8a9e\u53e5\u4e5f\u53ef\u4ee5\u7528\u65bc\u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u9700\u8981\u5c07\u67d0\u500b\u7528\u6236\u7684\u72c0\u614b\u66f4\u65b0\u70ba\u201c\u6d3b\u8e8d\u201d\uff0c\u53ef\u4ee5\u9019\u6a23\u505a\uff1a<\/p>\n<pre><code>DO UPDATE users SET status = 'active' WHERE id = 1;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u64cd\u4f5c\u5c07\u66f4\u65b0\u7528\u6236\u7684\u72c0\u614b\uff0c\u4f46\u4e0d\u6703\u8fd4\u56de\u4efb\u4f55\u7d50\u679c\u3002<\/p>\n<h3 id=\"3-%e8%aa%bf%e7%94%a8%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b-qCwfLoLLcO\">3. \u8abf\u7528\u5b58\u5132\u904e\u7a0b<\/h3>\n<p>\u5982\u679c\u6211\u5011\u6709\u4e00\u500b\u5b58\u5132\u904e\u7a0b\u9700\u8981\u57f7\u884c\uff0c\u4f46\u4e0d\u9700\u8981\u8fd4\u56de\u7d50\u679c\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528DO\u8a9e\u53e5\uff1a<\/p>\n<pre><code>DO my_stored_procedure();<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u7c21\u55ae\u5730\u8abf\u7528\u5b58\u5132\u904e\u7a0b\uff0c\u800c\u4e0d\u5fc5\u64d4\u5fc3\u7d50\u679c\u96c6\u7684\u8655\u7406\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-qCwfLoLLcO\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u96d6\u7136DO\u8a9e\u53e5\u975e\u5e38\u6709\u7528\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u4ecd\u9700\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>DO\u8a9e\u53e5\u4e0d\u9069\u5408\u7528\u65bc\u9700\u8981\u8fd4\u56de\u7d50\u679c\u7684\u64cd\u4f5c\u3002<\/li>\n<li>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528DO\u8a9e\u53e5\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u5927\u91cf\u6578\u64da\u64cd\u4f5c\u6642\u3002<\/li>\n<li>\u78ba\u4fdd\u5728\u4f7f\u7528DO\u8a9e\u53e5\u6642\uff0c\u8868\u9054\u5f0f\u7684\u6b63\u78ba\u6027\uff0c\u4ee5\u907f\u514d\u610f\u5916\u7684\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-qCwfLoLLcO\">\u7e3d\u7d50<\/h2>\n<p>DO\u8a9e\u53e5\u5728MySQL\u6578\u64da\u5eab\u4e2d\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u9069\u5408\u7528\u65bc\u57f7\u884c\u4e0d\u9700\u8981\u8fd4\u56de\u7d50\u679c\u7684\u64cd\u4f5c\u3002\u7121\u8ad6\u662f\u8a08\u7b97\u3001\u66f4\u65b0\u6578\u64da\u9084\u662f\u8abf\u7528\u5b58\u5132\u904e\u7a0b\uff0cDO\u8a9e\u53e5\u90fd\u80fd\u63d0\u4f9b\u9748\u6d3b\u6027\u548c\u9ad8\u6548\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\u5834\u666f\uff0c\u4e86\u89e3\u548c\u638c\u63e1DO\u8a9e\u53e5\u7684\u4f7f\u7528\u5c07\u662f\u975e\u5e38\u6709\u76ca\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u7db2\u7ad9\u6258\u7ba1\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u6700\u4f73\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6578\u64da\u5eab\u4e2d\u7684DO\u8a9e\u53e5\uff0c\u5b78\u7fd2\u5982\u4f55\u57f7\u884c\u4e0d\u8fd4\u56de\u7d50\u679c\u7684SQL\u8a9e\u53e5\uff0c\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-76712","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76712","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=76712"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76712\/revisions"}],"predecessor-version":[{"id":76713,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76712\/revisions\/76713"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76712"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76712"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76712"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}