{"id":168491,"date":"2024-11-06T12:49:20","date_gmt":"2024-11-06T04:49:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/168491\/"},"modified":"2024-11-06T12:49:21","modified_gmt":"2024-11-06T04:49:21","slug":"sql-%e4%b8%ad-convert-%e5%87%bd%e6%95%b8%e8%a9%b3%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/168491\/","title":{"rendered":"SQL \u4e2d CONVERT \u51fd\u6578\u8a73\u89e3"},"content":{"rendered":"<h1 id=\"sql-%e4%b8%ad-convert-%e5%87%bd%e6%95%b8%e8%a9%b3%e8%a7%a3-ykfCUJxasN\">SQL \u4e2d CONVERT \u51fd\u6578\u8a73\u89e3<\/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\u8a73\u7d30\u4ecb\u7d39 <code>CONVERT<\/code> \u51fd\u6578\u7684\u7528\u6cd5\u3001\u8a9e\u6cd5\u53ca\u5176\u61c9\u7528\u793a\u4f8b\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-ykfCUJxasN\">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\u6216\u6a23\u5f0f\uff0c\u4e3b\u8981\u7528\u65bc\u65e5\u671f\u548c\u6642\u9593\u7684\u8f49\u63db\u3002<\/li>\n<\/ul>\n<h2 id=\"convert-%e5%87%bd%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b-ykfCUJxasN\">CONVERT \u51fd\u6578\u7684\u4f7f\u7528\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528 <code>CONVERT<\/code> \u51fd\u6578\u7684\u793a\u4f8b\uff0c\u5e6b\u52a9\u7406\u89e3\u5176\u5be6\u969b\u61c9\u7528\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-1%ef%bc%9a%e5%b0%87%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%bd%89%e6%8f%9b%e7%82%ba%e6%95%b4%e6%95%b8-ykfCUJxasN\">\u793a\u4f8b 1\uff1a\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u6574\u6578<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5b57\u7b26\u4e32 &#8216;12345&#8217;\uff0c\u6211\u5011\u5e0c\u671b\u5c07\u5176\u8f49\u63db\u70ba\u6574\u6578\u985e\u578b\uff1a<\/p>\n<pre><code>SELECT CONVERT(INT, '12345') AS ConvertedInteger;<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u67e5\u8a62\u5f8c\uff0c\u7d50\u679c\u5c07\u986f\u793a\u70ba\u6574\u6578 12345\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-2%ef%bc%9a%e5%b0%87%e6%97%a5%e6%9c%9f%e8%bd%89%e6%8f%9b%e7%82%ba%e5%ad%97%e7%ac%a6%e4%b8%b2-ykfCUJxasN\">\u793a\u4f8b 2\uff1a\u5c07\u65e5\u671f\u8f49\u63db\u70ba\u5b57\u7b26\u4e32<\/h3>\n<p>\u5728\u8655\u7406\u65e5\u671f\u6642\uff0c<code>CONVERT<\/code> \u51fd\u6578\u53ef\u4ee5\u7528\u4f86\u5c07\u65e5\u671f\u683c\u5f0f\u5316\u70ba\u7279\u5b9a\u7684\u5b57\u7b26\u4e32\u683c\u5f0f\u3002\u4f8b\u5982\uff0c\u5c07\u7576\u524d\u65e5\u671f\u8f49\u63db\u70ba &#8216;YYYY-MM-DD&#8217; \u683c\u5f0f\uff1a<\/p>\n<pre><code>SELECT CONVERT(VARCHAR(10), GETDATE(), 120) AS FormattedDate;<\/code><\/pre>\n<p>\u9019\u88e1\uff0c<code>120<\/code> \u662f\u6307\u5b9a\u7684\u6a23\u5f0f\u4ee3\u78bc\uff0c\u8868\u793a &#8216;YYYY-MM-DD&#8217; \u683c\u5f0f\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-3%ef%bc%9a%e5%b0%87%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%bd%89%e6%8f%9b%e7%82%ba%e6%97%a5%e6%9c%9f-ykfCUJxasN\">\u793a\u4f8b 3\uff1a\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u65e5\u671f<\/h3>\n<p>\u5982\u679c\u6211\u5011\u6709\u4e00\u500b\u5b57\u7b26\u4e32 &#8216;2023-10-01&#8217;\uff0c\u4e26\u5e0c\u671b\u5c07\u5176\u8f49\u63db\u70ba\u65e5\u671f\u985e\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT CONVERT(DATE, '2023-10-01') AS ConvertedDate;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u4e00\u500b\u65e5\u671f\u985e\u578b\u7684\u503c\uff0c\u8868\u793a 2023 \u5e74 10 \u6708 1 \u65e5\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-ykfCUJxasN\">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\u53ef\u4ee5\u6210\u529f\u8f49\u63db\u70ba\u76ee\u6a19\u6578\u64da\u985e\u578b\uff0c\u5426\u5247\u6703\u5f15\u767c\u932f\u8aa4\u3002<\/li>\n<li>\u5728\u8f49\u63db\u65e5\u671f\u548c\u6642\u9593\u6642\uff0c\u9078\u64c7\u5408\u9069\u7684\u6a23\u5f0f\u4ee3\u78bc\u4ee5\u7372\u5f97\u6240\u9700\u7684\u683c\u5f0f\u3002<\/li>\n<li>\u4e0d\u540c\u7684 SQL \u6578\u64da\u5eab\u7cfb\u7d71\u53ef\u80fd\u5c0d <code>CONVERT<\/code> \u51fd\u6578\u7684\u652f\u6301\u548c\u5be6\u73fe\u6709\u6240\u4e0d\u540c\uff0c\u4f7f\u7528\u6642\u9700\u53c3\u8003\u76f8\u61c9\u7684\u6587\u6a94\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ykfCUJxasN\">\u7e3d\u7d50<\/h2>\n<p>\u7e3d\u7684\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\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u6574\u6578\uff0c\u9084\u662f\u5c07\u65e5\u671f\u683c\u5f0f\u5316\u70ba\u7279\u5b9a\u7684\u5b57\u7b26\u4e32\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\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u3002\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u4e86\u89e3 SQL \u4e2d\u7684 CONVERT \u51fd\u6578\uff0c\u5b78\u7fd2\u5982\u4f55\u8f49\u63db\u6578\u64da\u985e\u578b\u53ca\u5176\u61c9\u7528\u7bc4\u4f8b\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u80fd\u529b\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-168491","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168491","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=168491"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168491\/revisions"}],"predecessor-version":[{"id":168492,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168491\/revisions\/168492"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=168491"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=168491"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=168491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}