{"id":141807,"date":"2024-10-31T22:06:20","date_gmt":"2024-10-31T14:06:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/141807\/"},"modified":"2024-10-31T22:06:21","modified_gmt":"2024-10-31T14:06:21","slug":"sql-server-%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%87%bd%e6%95%b8%e5%88%86%e9%a1%9e%e8%a9%b3%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/141807\/","title":{"rendered":"SQL Server \u5b57\u7b26\u4e32\u51fd\u6578\u5206\u985e\u8a73\u89e3"},"content":{"rendered":"<h1 id=\"sql-server-%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%87%bd%e6%95%b8%e5%88%86%e9%a1%9e%e8%a9%b3%e8%a7%a3-gjTsAZREvr\">SQL Server \u5b57\u7b26\u4e32\u51fd\u6578\u5206\u985e\u8a73\u89e3<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u5b57\u7b26\u4e32\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u4e00\u74b0\u3002SQL Server \u63d0\u4f9b\u4e86\u591a\u7a2e\u5b57\u7b26\u4e32\u51fd\u6578\uff0c\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u9032\u884c\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u548c\u8655\u7406\u3002\u672c\u6587\u5c07\u5c0d SQL Server \u4e2d\u7684\u5b57\u7b26\u4e32\u51fd\u6578\u9032\u884c\u8a73\u7d30\u5206\u985e\u548c\u89e3\u91cb\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528\u9019\u4e9b\u51fd\u6578\u3002<\/p>\n<h2 id=\"%e4%b8%80%e3%80%81%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%95%b7%e5%ba%a6%e5%87%bd%e6%95%b8-gjTsAZREvr\">\u4e00\u3001\u5b57\u7b26\u4e32\u9577\u5ea6\u51fd\u6578<\/h2>\n<p>\u5b57\u7b26\u4e32\u9577\u5ea6\u51fd\u6578\u4e3b\u8981\u7528\u65bc\u8a08\u7b97\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u3002\u6700\u5e38\u7528\u7684\u51fd\u6578\u662f <code>LEN()<\/code> \u548c <code>DATALENGTH()<\/code>\u3002<\/p>\n<ul>\n<li><code>LEN(string)<\/code>\uff1a\u8fd4\u56de\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u6578\uff0c\u4e0d\u5305\u62ec\u5c3e\u96a8\u7a7a\u683c\u3002<\/li>\n<li><code>DATALENGTH(string)<\/code>\uff1a\u8fd4\u56de\u5b57\u7b26\u4e32\u7684\u5b57\u7bc0\u6578\uff0c\u5305\u62ec\u5c3e\u96a8\u7a7a\u683c\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT LEN('Hello World'); -- \u8fd4\u56de 11\nSELECT DATALENGTH('Hello World'); -- \u8fd4\u56de 12\n<\/code><\/pre>\n<h2 id=\"%e4%ba%8c%e3%80%81%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%80%a3%e6%8e%a5%e5%87%bd%e6%95%b8-gjTsAZREvr\">\u4e8c\u3001\u5b57\u7b26\u4e32\u9023\u63a5\u51fd\u6578<\/h2>\n<p>\u5b57\u7b26\u4e32\u9023\u63a5\u51fd\u6578\u7528\u65bc\u5c07\u591a\u500b\u5b57\u7b26\u4e32\u5408\u4f75\u70ba\u4e00\u500b\u5b57\u7b26\u4e32\u3002\u6700\u5e38\u7528\u7684\u51fd\u6578\u662f <code>CONCAT()<\/code> \u548c <code>+\uff08\u52a0\u865f\uff09<\/code>\u3002<\/p>\n<ul>\n<li><code>CONCAT(string1, string2, ...)<\/code>\uff1a\u5c07\u591a\u500b\u5b57\u7b26\u4e32\u9023\u63a5\u5728\u4e00\u8d77\u3002<\/li>\n<li><code>string1 + string2<\/code>\uff1a\u4f7f\u7528\u52a0\u865f\u4e5f\u53ef\u4ee5\u5be6\u73fe\u5b57\u7b26\u4e32\u7684\u9023\u63a5\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT CONCAT('Hello', ' ', 'World'); -- \u8fd4\u56de 'Hello World'\nSELECT 'Hello' + ' ' + 'World'; -- \u8fd4\u56de 'Hello World'\n<\/code><\/pre>\n<h2 id=\"%e4%b8%89%e3%80%81%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%9f%a5%e6%89%be%e5%87%bd%e6%95%b8-gjTsAZREvr\">\u4e09\u3001\u5b57\u7b26\u4e32\u67e5\u627e\u51fd\u6578<\/h2>\n<p>\u5b57\u7b26\u4e32\u67e5\u627e\u51fd\u6578\u7528\u65bc\u5728\u5b57\u7b26\u4e32\u4e2d\u67e5\u627e\u7279\u5b9a\u7684\u5b50\u5b57\u7b26\u4e32\u3002\u5e38\u7528\u7684\u51fd\u6578\u5305\u62ec <code>CHARINDEX()<\/code> \u548c <code>PATINDEX()<\/code>\u3002<\/p>\n<ul>\n<li><code>CHARINDEX(substring, string)<\/code>\uff1a\u8fd4\u56de\u5b50\u5b57\u7b26\u4e32\u5728\u5b57\u7b26\u4e32\u4e2d\u9996\u6b21\u51fa\u73fe\u7684\u4f4d\u7f6e\u3002<\/li>\n<li><code>PATINDEX(pattern, string)<\/code>\uff1a\u8fd4\u56de\u7b26\u5408\u6a21\u5f0f\u7684\u5b50\u5b57\u7b26\u4e32\u5728\u5b57\u7b26\u4e32\u4e2d\u9996\u6b21\u51fa\u73fe\u7684\u4f4d\u7f6e\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT CHARINDEX('World', 'Hello World'); -- \u8fd4\u56de 7\nSELECT PATINDEX('%o%', 'Hello World'); -- \u8fd4\u56de 5\n<\/code><\/pre>\n<h2 id=\"%e5%9b%9b%e3%80%81%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%9b%bf%e6%8f%9b%e5%87%bd%e6%95%b8-gjTsAZREvr\">\u56db\u3001\u5b57\u7b26\u4e32\u66ff\u63db\u51fd\u6578<\/h2>\n<p>\u5b57\u7b26\u4e32\u66ff\u63db\u51fd\u6578\u7528\u65bc\u66ff\u63db\u5b57\u7b26\u4e32\u4e2d\u7684\u7279\u5b9a\u90e8\u5206\u3002\u6700\u5e38\u7528\u7684\u51fd\u6578\u662f <code>REPLACE()<\/code> \u548c <code>STUFF()<\/code>\u3002<\/p>\n<ul>\n<li><code>REPLACE(string, old_string, new_string)<\/code>\uff1a\u5c07\u5b57\u7b26\u4e32\u4e2d\u7684\u820a\u5b57\u7b26\u4e32\u66ff\u63db\u70ba\u65b0\u5b57\u7b26\u4e32\u3002<\/li>\n<li><code>STUFF(string, start, length, new_string)<\/code>\uff1a\u5f9e\u5b57\u7b26\u4e32\u7684\u6307\u5b9a\u4f4d\u7f6e\u958b\u59cb\uff0c\u522a\u9664\u6307\u5b9a\u9577\u5ea6\u7684\u5b57\u7b26\uff0c\u7136\u5f8c\u63d2\u5165\u65b0\u5b57\u7b26\u4e32\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT REPLACE('Hello World', 'World', 'SQL Server'); -- \u8fd4\u56de 'Hello SQL Server'\nSELECT STUFF('Hello World', 7, 5, 'SQL Server'); -- \u8fd4\u56de 'Hello SQL Server'\n<\/code><\/pre>\n<h2 id=\"%e4%ba%94%e3%80%81%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%a0%bc%e5%bc%8f%e5%8c%96%e5%87%bd%e6%95%b8-gjTsAZREvr\">\u4e94\u3001\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u51fd\u6578<\/h2>\n<p>\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u51fd\u6578\u7528\u65bc\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u7684\u8f38\u51fa\u3002\u5e38\u7528\u7684\u51fd\u6578\u5305\u62ec <code>FORMAT()<\/code> \u548c <code>CONVERT()<\/code>\u3002<\/p>\n<ul>\n<li><code>FORMAT(value, format)<\/code>\uff1a\u5c07\u503c\u683c\u5f0f\u5316\u70ba\u6307\u5b9a\u7684\u683c\u5f0f\u3002<\/li>\n<li><code>CONVERT(data_type, expression, style)<\/code>\uff1a\u5c07\u4e00\u500b\u6578\u64da\u985e\u578b\u8f49\u63db\u70ba\u53e6\u4e00\u500b\u6578\u64da\u985e\u578b\uff0c\u4e26\u53ef\u4ee5\u6307\u5b9a\u683c\u5f0f\u6a23\u5f0f\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT FORMAT(GETDATE(), 'yyyy-MM-dd'); -- \u8fd4\u56de\u7576\u524d\u65e5\u671f\u7684\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\nSELECT CONVERT(VARCHAR, GETDATE(), 120); -- \u8fd4\u56de 'yyyy-mm-dd hh:mi:ss' \u683c\u5f0f\u7684\u7576\u524d\u65e5\u671f\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-gjTsAZREvr\">\u7e3d\u7d50<\/h2>\n<p>SQL Server \u63d0\u4f9b\u4e86\u591a\u7a2e\u5b57\u7b26\u4e32\u51fd\u6578\uff0c\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u9032\u884c\u5404\u7a2e\u5b57\u7b26\u4e32\u64cd\u4f5c\uff0c\u5305\u62ec\u8a08\u7b97\u9577\u5ea6\u3001\u9023\u63a5\u3001\u67e5\u627e\u3001\u66ff\u63db\u548c\u683c\u5f0f\u5316\u7b49\u3002\u638c\u63e1\u9019\u4e9b\u51fd\u6578\u7684\u4f7f\u7528\uff0c\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u548c\u9748\u6d3b\u6027\u3002\u5982\u679c\u60a8\u9700\u8981\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<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0e SQL Server \u4e2d\u7684\u5b57\u7b26\u4e32\u51fd\u6578\uff0c\u5206\u985e\u8a73\u89e3\u5404\u7a2e\u51fd\u6578\u7684\u7528\u9014\u8207\u7bc4\u4f8b\uff0c\u52a9\u60a8\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-141807","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/141807","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=141807"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/141807\/revisions"}],"predecessor-version":[{"id":141808,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/141807\/revisions\/141808"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=141807"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=141807"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=141807"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}