{"id":144081,"date":"2024-11-01T05:01:33","date_gmt":"2024-10-31T21:01:33","guid":{"rendered":"https:\/\/server.hk\/cnblog\/144081\/"},"modified":"2024-11-01T05:01:34","modified_gmt":"2024-10-31T21:01:34","slug":"sql-%e4%b8%ad-convert-%e5%87%bd%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/144081\/","title":{"rendered":"SQL \u4e2d CONVERT \u51fd\u6578\u7684\u4f7f\u7528"},"content":{"rendered":"<h1 id=\"sql-%e4%b8%ad-convert-%e5%87%bd%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8-XldrfkjvLj\">SQL \u4e2d CONVERT \u51fd\u6578\u7684\u4f7f\u7528<\/h1>\n<p>\u5728 SQL \u4e2d\uff0c\u6578\u64da\u985e\u578b\u7684\u8f49\u63db\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\uff0c\u5c24\u5176\u662f\u5728\u8655\u7406\u4e0d\u540c\u4f86\u6e90\u7684\u6578\u64da\u6642\u3002SQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u51fd\u6578\u4f86\u9032\u884c\u6578\u64da\u985e\u578b\u7684\u8f49\u63db\uff0c\u5176\u4e2d <code>CONVERT<\/code> \u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u5de5\u5177\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e <code>CONVERT<\/code> \u51fd\u6578\u7684\u4f7f\u7528\u65b9\u6cd5\u53ca\u5176\u61c9\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"convert-%e5%87%bd%e6%95%b8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-XldrfkjvLj\">CONVERT \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p><code>CONVERT<\/code> \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CONVERT(data_type, expression, style)<\/code><\/pre>\n<ul>\n<li><strong>data_type<\/strong>\uff1a\u76ee\u6a19\u6578\u64da\u985e\u578b\uff0c\u6307\u5b9a\u8981\u8f49\u63db\u6210\u7684\u6578\u64da\u985e\u578b\u3002<\/li>\n<li><strong>expression<\/strong>\uff1a\u8981\u8f49\u63db\u7684\u539f\u59cb\u6578\u64da\u3002<\/li>\n<li><strong>style<\/strong>\uff1a\u53ef\u9078\u53c3\u6578\uff0c\u6307\u5b9a\u8f49\u63db\u7684\u683c\u5f0f\uff0c\u7279\u5225\u662f\u5728\u65e5\u671f\u548c\u6642\u9593\u7684\u8f49\u63db\u4e2d\u975e\u5e38\u6709\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"convert-%e5%87%bd%e6%95%b8%e7%9a%84%e6%87%89%e7%94%a8%e7%a4%ba%e4%be%8b-XldrfkjvLj\">CONVERT \u51fd\u6578\u7684\u61c9\u7528\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528 <code>CONVERT<\/code> \u51fd\u6578\u7684\u5be6\u969b\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"1-%e6%95%b8%e5%ad%97%e8%bd%89%e6%8f%9b%e7%82%ba%e5%ad%97%e7%ac%a6%e4%b8%b2-XldrfkjvLj\">1. \u6578\u5b57\u8f49\u63db\u70ba\u5b57\u7b26\u4e32<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u6578\u5b57\uff0c\u60f3\u5c07\u5176\u8f49\u63db\u70ba\u5b57\u7b26\u4e32\u683c\u5f0f\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT CONVERT(VARCHAR(10), 12345) AS ConvertedString;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u4e00\u500b\u5b57\u7b26\u4e32 &#8216;12345&#8217;\u3002<\/p>\n<h3 id=\"2-%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%bd%89%e6%8f%9b%e7%82%ba%e6%97%a5%e6%9c%9f-XldrfkjvLj\">2. \u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u65e5\u671f<\/h3>\n<p>\u5728\u8655\u7406\u65e5\u671f\u6578\u64da\u6642\uff0c<code>CONVERT<\/code> \u51fd\u6578\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u65e5\u671f\u683c\u5f0f\uff1a<\/p>\n<pre><code>SELECT CONVERT(DATE, '2023-10-01', 120) AS ConvertedDate;<\/code><\/pre>\n<p>\u9019\u88e1\u7684 <code>120<\/code> \u662f\u6307\u5b9a\u7684\u6a23\u5f0f\uff0c\u8868\u793a &#8216;yyyy-mm-dd&#8217; \u683c\u5f0f\u3002<\/p>\n<h3 id=\"3-%e6%97%a5%e6%9c%9f%e8%bd%89%e6%8f%9b%e7%82%ba%e5%ad%97%e7%ac%a6%e4%b8%b2-XldrfkjvLj\">3. \u65e5\u671f\u8f49\u63db\u70ba\u5b57\u7b26\u4e32<\/h3>\n<p>\u540c\u6a23\u5730\uff0c\u6211\u5011\u4e5f\u53ef\u4ee5\u5c07\u65e5\u671f\u8f49\u63db\u70ba\u7279\u5b9a\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\uff1a<\/p>\n<pre><code>SELECT CONVERT(VARCHAR(10), GETDATE(), 101) AS FormattedDate;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u7576\u524d\u65e5\u671f\uff0c\u683c\u5f0f\u70ba &#8216;mm\/dd\/yyyy&#8217;\u3002<\/p>\n<h2 id=\"convert-%e5%87%bd%e6%95%b8%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-XldrfkjvLj\">CONVERT \u51fd\u6578\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528 <code>CONVERT<\/code> \u51fd\u6578\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u539f\u59cb\u6578\u64da\u985e\u578b\u8207\u76ee\u6a19\u6578\u64da\u985e\u578b\u4e4b\u9593\u662f\u517c\u5bb9\u7684\uff0c\u5426\u5247\u53ef\u80fd\u6703\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<li>\u5728\u8f49\u63db\u65e5\u671f\u548c\u6642\u9593\u6642\uff0c\u9078\u64c7\u6b63\u78ba\u7684\u6a23\u5f0f\u975e\u5e38\u91cd\u8981\uff0c\u56e0\u70ba\u4e0d\u540c\u7684\u6a23\u5f0f\u6703\u5f71\u97ff\u7d50\u679c\u7684\u683c\u5f0f\u3002<\/li>\n<li>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528 <code>CAST<\/code> \u51fd\u6578\u4e5f\u53ef\u4ee5\u9054\u5230\u985e\u4f3c\u7684\u6548\u679c\uff0c\u4f46 <code>CONVERT<\/code> \u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u683c\u5f0f\u9078\u64c7\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-XldrfkjvLj\">\u7d50\u8ad6<\/h2>\n<p>\u7e3d\u7d50\u4f86\u8aaa\uff0c<code>CONVERT<\/code> \u51fd\u6578\u5728 SQL \u4e2d\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728\u4e0d\u540c\u6578\u64da\u985e\u578b\u4e4b\u9593\u9032\u884c\u9748\u6d3b\u7684\u8f49\u63db\u3002\u7121\u8ad6\u662f\u5c07\u6578\u5b57\u8f49\u63db\u70ba\u5b57\u7b26\u4e32\uff0c\u9084\u662f\u5c07\u65e5\u671f\u683c\u5f0f\u5316\uff0c<code>CONVERT<\/code> \u51fd\u6578\u90fd\u80fd\u63d0\u4f9b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u61c9\u7528\u5834\u666f\uff0c\u638c\u63e1 <code>CONVERT<\/code> \u51fd\u6578\u7684\u4f7f\u7528\u5c07\u5927\u5927\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f <a href=\"https:\/\/server.hk\">\u4e91\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3 SQL \u4e2d CONVERT \u51fd\u6578\u7684\u7528\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u5728\u6578\u64da\u985e\u578b\u4e4b\u9593\u9032\u884c\u8f49\u63db\uff0c\u63d0\u5347\u6578\u64da\u8655\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-144081","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144081","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=144081"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144081\/revisions"}],"predecessor-version":[{"id":144082,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144081\/revisions\/144082"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=144081"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=144081"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=144081"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}