{"id":78344,"date":"2024-10-16T11:48:17","date_gmt":"2024-10-16T03:48:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/78344\/"},"modified":"2024-10-16T11:48:17","modified_gmt":"2024-10-16T03:48:17","slug":"mysql%e6%8c%87%e4%bb%a4-do%ef%bc%88%e5%9f%b7%e8%a1%8c%e8%aa%9e%e5%8f%a5%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/78344\/","title":{"rendered":"MySQL\u6307\u4ee4: DO\uff08\u57f7\u884c\u8a9e\u53e5\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-do%ef%bc%88%e5%9f%b7%e8%a1%8c%e8%aa%9e%e5%8f%a5%ef%bc%89-lUDRCQkpNJ\">MySQL\u6307\u4ee4: DO\uff08\u57f7\u884c\u8a9e\u53e5\uff09<\/h1>\n<p>\u5728MySQL\u4e2d\uff0c<code>DO<\/code>\u6307\u4ee4\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u5de5\u5177\uff0c\u4e3b\u8981\u7528\u65bc\u57f7\u884c\u4e0d\u8fd4\u56de\u7d50\u679c\u96c6\u7684\u8a9e\u53e5\u3002\u9019\u4f7f\u5f97\u5b83\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\u8a0e<code>DO<\/code>\u6307\u4ee4\u7684\u7528\u6cd5\u3001\u8a9e\u6cd5\u53ca\u5176\u61c9\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"do%e6%8c%87%e4%bb%a4%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-lUDRCQkpNJ\">DO\u6307\u4ee4\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p><code>DO<\/code>\u6307\u4ee4\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>DO expr;<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>expr<\/code>\u53ef\u4ee5\u662f\u4efb\u4f55\u6709\u6548\u7684MySQL\u8868\u9054\u5f0f\u6216\u8a9e\u53e5\u3002\u9019\u610f\u5473\u8457\u4f60\u53ef\u4ee5\u5728<code>DO<\/code>\u6307\u4ee4\u4e2d\u57f7\u884c\u591a\u7a2e\u64cd\u4f5c\uff0c\u4f8b\u5982\u66f4\u65b0\u6578\u64da\u3001\u63d2\u5165\u6578\u64da\u6216\u8abf\u7528\u5b58\u5132\u904e\u7a0b\u7b49\u3002<\/p>\n<h2 id=\"do%e6%8c%87%e4%bb%a4%e7%9a%84%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-lUDRCQkpNJ\">DO\u6307\u4ee4\u7684\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528<code>DO<\/code>\u6307\u4ee4\u7684\u7bc4\u4f8b\uff1a<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b1-%e5%9f%b7%e8%a1%8c%e7%b0%a1%e5%96%ae%e7%9a%84%e6%95%b8%e5%ad%b8%e9%81%8b%e7%ae%97-lUDRCQkpNJ\">\u7bc4\u4f8b1: \u57f7\u884c\u7c21\u55ae\u7684\u6578\u5b78\u904b\u7b97<\/h3>\n<p>\u4f60\u53ef\u4ee5\u4f7f\u7528<code>DO<\/code>\u6307\u4ee4\u4f86\u57f7\u884c\u7c21\u55ae\u7684\u6578\u5b78\u904b\u7b97\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre><code>DO 1 + 1;<\/code><\/pre>\n<p>\u9019\u689d\u6307\u4ee4\u5c07\u8a08\u7b971 + 1\uff0c\u4f46\u4e0d\u6703\u8fd4\u56de\u4efb\u4f55\u7d50\u679c\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b2-%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a-lUDRCQkpNJ\">\u7bc4\u4f8b2: \u66f4\u65b0\u6578\u64da<\/h3>\n<p>\u5047\u8a2d\u4f60\u6709\u4e00\u500b\u540d\u70ba<code>users<\/code>\u7684\u8868\uff0c\u4e26\u5e0c\u671b\u66f4\u65b0\u67d0\u500b\u7528\u6236\u7684\u72c0\u614b\uff0c\u4f60\u53ef\u4ee5\u9019\u6a23\u505a\uff1a<\/p>\n<pre><code>DO UPDATE users SET status = 'active' WHERE id = 1;<\/code><\/pre>\n<p>\u9019\u689d\u6307\u4ee4\u5c07\u66f4\u65b0ID\u70ba1\u7684\u7528\u6236\u7684\u72c0\u614b\u70ba\u201cactive\u201d\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b3-%e8%aa%bf%e7%94%a8%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b-lUDRCQkpNJ\">\u7bc4\u4f8b3: \u8abf\u7528\u5b58\u5132\u904e\u7a0b<\/h3>\n<p>\u5982\u679c\u4f60\u6709\u4e00\u500b\u5b58\u5132\u904e\u7a0b\u9700\u8981\u57f7\u884c\uff0c\u53ef\u4ee5\u4f7f\u7528<code>DO<\/code>\u6307\u4ee4\u4f86\u8abf\u7528\u5b83\uff1a<\/p>\n<pre><code>DO my_stored_procedure();<\/code><\/pre>\n<p>\u9019\u5c07\u57f7\u884c\u540d\u70ba<code>my_stored_procedure<\/code>\u7684\u5b58\u5132\u904e\u7a0b\uff0c\u800c\u4e0d\u6703\u8fd4\u56de\u4efb\u4f55\u7d50\u679c\u3002<\/p>\n<h2 id=\"do%e6%8c%87%e4%bb%a4%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-lUDRCQkpNJ\">DO\u6307\u4ee4\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p><code>DO<\/code>\u6307\u4ee4\u5728\u591a\u7a2e\u60c5\u6cc1\u4e0b\u90fd\u975e\u5e38\u6709\u7528\uff0c\u7279\u5225\u662f\u5728\u4ee5\u4e0b\u5834\u666f\u4e2d\uff1a<\/p>\n<ul>\n<li><strong>\u57f7\u884c\u8a08\u7b97\u6216\u908f\u8f2f\u64cd\u4f5c\uff1a<\/strong>\u7576\u4f60\u9700\u8981\u57f7\u884c\u67d0\u4e9b\u8a08\u7b97\u6216\u908f\u8f2f\u64cd\u4f5c\uff0c\u4f46\u4e0d\u9700\u8981\u7d50\u679c\u6642\uff0c<code>DO<\/code>\u6307\u4ee4\u662f\u6700\u4f73\u9078\u64c7\u3002<\/li>\n<li><strong>\u89f8\u767c\u5668\u4e2d\u7684\u64cd\u4f5c\uff1a<\/strong>\u5728\u89f8\u767c\u5668\u4e2d\uff0c<code>DO<\/code>\u6307\u4ee4\u53ef\u4ee5\u7528\u4f86\u57f7\u884c\u67d0\u4e9b\u64cd\u4f5c\uff0c\u800c\u4e0d\u9700\u8981\u8fd4\u56de\u7d50\u679c\u3002<\/li>\n<li><strong>\u6279\u91cf\u8655\u7406\uff1a<\/strong>\u5728\u6279\u91cf\u8655\u7406\u6578\u64da\u6642\uff0c<code>DO<\/code>\u6307\u4ee4\u53ef\u4ee5\u7528\u4f86\u57f7\u884c\u591a\u500b\u64cd\u4f5c\uff0c\u800c\u4e0d\u9700\u8981\u6bcf\u6b21\u90fd\u8fd4\u56de\u7d50\u679c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-lUDRCQkpNJ\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u96d6\u7136<code>DO<\/code>\u6307\u4ee4\u975e\u5e38\u6709\u7528\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u4e0d\u8fd4\u56de\u7d50\u679c\uff1a<\/strong>\u4f7f\u7528<code>DO<\/code>\u6307\u4ee4\u6642\uff0c\u8acb\u8a18\u4f4f\u5b83\u4e0d\u6703\u8fd4\u56de\u4efb\u4f55\u7d50\u679c\u96c6\uff0c\u56e0\u6b64\u7121\u6cd5\u7528\u65bc\u67e5\u8a62\u6578\u64da\u3002<\/li>\n<li><strong>\u6027\u80fd\u8003\u91cf\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528<code>DO<\/code>\u6307\u4ee4\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u57f7\u884c\u5927\u91cf\u64cd\u4f5c\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-lUDRCQkpNJ\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u4e2d\u7684<code>DO<\/code>\u6307\u4ee4\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\u9032\u884c\u6578\u5b78\u8a08\u7b97\u3001\u66f4\u65b0\u6578\u64da\u9084\u662f\u8abf\u7528\u5b58\u5132\u904e\u7a0b\uff0c<code>DO<\/code>\u6307\u4ee4\u90fd\u80fd\u63d0\u4f9b\u4fbf\u5229\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u57f7\u884c\u64cd\u4f5c\u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u4e86\u89e3<code>DO<\/code>\u6307\u4ee4\u7684\u4f7f\u7528\u65b9\u6cd5\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u89e3\u6c7a\u65b9\u6848\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f\u500b\u4eba\u9805\u76ee\u9084\u662f\u4f01\u696d\u61c9\u7528\uff0c\u6211\u5011\u7684<code><a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a><\/code>\u90fd\u80fd\u70ba\u4f60\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6307\u4ee4DO\u7684\u7528\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u57f7\u884c\u8a9e\u53e5\u4ee5\u9032\u884c\u6578\u64da\u64cd\u4f5c\u548c\u81ea\u52d5\u5316\u4efb\u52d9\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\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-78344","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78344","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=78344"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78344\/revisions"}],"predecessor-version":[{"id":78345,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78344\/revisions\/78345"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=78344"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=78344"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=78344"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}