{"id":170647,"date":"2024-11-06T22:42:20","date_gmt":"2024-11-06T14:42:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/170647\/"},"modified":"2024-11-06T22:42:21","modified_gmt":"2024-11-06T14:42:21","slug":"%e6%8b%bc%e6%8e%a5mssql%e5%88%97%e5%90%8d%ef%bc%9a%e7%94%a8%e6%96%b9%e6%8b%ac%e8%99%9f%e8%bc%95%e9%ac%86%e5%af%a6%e7%8f%be%ef%bc%88mssql%e5%88%97%e5%90%8d%e7%94%a8%e4%b8%ad%e6%8b%ac%e5%bc%a7%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/170647\/","title":{"rendered":"\u62fc\u63a5MSSQL\u5217\u540d\uff1a\u7528\u65b9\u62ec\u865f\u8f15\u9b06\u5be6\u73fe\uff08mssql\u5217\u540d\u7528\u4e2d\u62ec\u5f27\uff09"},"content":{"rendered":"

\u62fc\u63a5MSSQL\u5217\u540d\uff1a\u7528\u65b9\u62ec\u865f\u8f15\u9b06\u5be6\u73fe\uff08mssql\u5217\u540d\u7528\u4e2d\u62ec\u5f27\uff09<\/h1>\n

\u5728\u4f7f\u7528 Microsoft SQL Server\uff08MSSQL\uff09\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u5217\u540d\u7684\u62fc\u63a5\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u5c24\u5176\u662f\u5728\u8655\u7406\u5305\u542b\u7a7a\u683c\u6216\u7279\u6b8a\u5b57\u7b26\u7684\u5217\u540d\u6642\uff0c\u4f7f\u7528\u65b9\u62ec\u865f\u4f86\u5305\u88f9\u5217\u540d\u53ef\u4ee5\u6709\u6548\u907f\u514d\u8a9e\u6cd5\u932f\u8aa4\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528\u65b9\u62ec\u865f\u8f15\u9b06\u62fc\u63a5 MSSQL \u5217\u540d\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

\u70ba\u4ec0\u9ebc\u4f7f\u7528\u65b9\u62ec\u865f\uff1f<\/h2>\n

\u5728 MSSQL \u4e2d\uff0c\u65b9\u62ec\u865f\uff08[ ]\uff09\u7528\u65bc\u6a19\u8b58\u7b26\u7684\u754c\u5b9a\uff0c\u9019\u5305\u62ec\u8868\u540d\u3001\u5217\u540d\u3001\u6578\u64da\u5eab\u540d\u7b49\u3002\u7576\u5217\u540d\u4e2d\u5305\u542b\u7a7a\u683c\u3001\u7279\u6b8a\u5b57\u7b26\u6216\u662f SQL \u95dc\u9375\u5b57\u6642\uff0c\u4f7f\u7528\u65b9\u62ec\u865f\u53ef\u4ee5\u907f\u514d\u89e3\u6790\u932f\u8aa4\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u5217\u540d\u70ba “First Name”\uff0c\u5728 SQL \u67e5\u8a62\u4e2d\u76f4\u63a5\u4f7f\u7528\u6703\u5c0e\u81f4\u8a9e\u6cd5\u932f\u8aa4\uff0c\u9019\u6642\u5019\u5c31\u9700\u8981\u7528\u65b9\u62ec\u865f\u5c07\u5176\u5305\u88f9\u8d77\u4f86\u3002<\/p>\n

\u57fa\u672c\u8a9e\u6cd5<\/h2>\n

\u5728 MSSQL \u4e2d\uff0c\u4f7f\u7528\u65b9\u62ec\u865f\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

SELECT [\u5217\u540d] FROM [\u8868\u540d];<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba “Employees” \u7684\u8868\uff0c\u4e26\u4e14\u5176\u4e2d\u6709\u4e00\u500b\u5217\u540d\u70ba “First Name”\uff0c\u6211\u5011\u53ef\u4ee5\u9019\u6a23\u67e5\u8a62\uff1a<\/p>\n
SELECT [First Name] FROM [Employees];<\/code><\/pre>\n
\u62fc\u63a5\u5217\u540d\u7684\u5be6\u7528\u793a\u4f8b<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u62fc\u63a5\u591a\u500b\u5217\u540d\u4f86\u751f\u6210\u4e00\u500b\u65b0\u7684\u5217\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4f7f\u7528 `+` \u64cd\u4f5c\u7b26\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u62fc\u63a5 “First Name” \u548c “Last Name” \u5169\u500b\u5217\u540d\uff1a<\/p>\n
SELECT [First Name] + ' ' + [Last Name] AS [Full Name] FROM [Employees];<\/code><\/pre>\n
\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86 `+` \u64cd\u4f5c\u7b26\u4f86\u5c07 “First Name” \u548c “Last Name” \u5169\u500b\u5217\u7684\u503c\u62fc\u63a5\u5728\u4e00\u8d77\uff0c\u4e26\u4e14\u7528\u7a7a\u683c\u5206\u9694\uff0c\u6700\u7d42\u751f\u6210\u4e00\u500b\u540d\u70ba “Full Name” \u7684\u65b0\u5217\u3002<\/p>\n
\u8655\u7406\u7279\u6b8a\u5b57\u7b26<\/h2>\n
\u5982\u679c\u5217\u540d\u4e2d\u5305\u542b\u7279\u6b8a\u5b57\u7b26\uff0c\u4f8b\u5982 `@`\u3001`#` \u6216\u5176\u4ed6\u7b26\u865f\uff0c\u4f7f\u7528\u65b9\u62ec\u865f\u540c\u6a23\u53ef\u4ee5\u907f\u514d\u554f\u984c\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u5217\u540d\u70ba “Salary@2023″\uff0c\u6211\u5011\u53ef\u4ee5\u9019\u6a23\u67e5\u8a62\uff1a<\/p>\n
SELECT [Salary@2023] FROM [Employees];<\/code><\/pre>\n
\u4f7f\u7528\u52d5\u614b SQL \u62fc\u63a5\u5217\u540d<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u5217\u540d\u53ef\u80fd\u662f\u52d5\u614b\u751f\u6210\u7684\uff0c\u9019\u6642\u5019\u53ef\u4ee5\u4f7f\u7528\u52d5\u614b SQL \u4f86\u62fc\u63a5\u5217\u540d\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 `EXEC` \u8a9e\u53e5\u7684\u793a\u4f8b\uff1a<\/p>\n
DECLARE @sql NVARCHAR(MAX);\nSET @sql = N'SELECT [' + @ColumnName + '] FROM [Employees];';\nEXEC sp_executesql @sql;<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5c07\u5217\u540d\u5b58\u5132\u5728\u8b8a\u91cf `@ColumnName` \u4e2d\uff0c\u7136\u5f8c\u4f7f\u7528\u52d5\u614b SQL \u4f86\u57f7\u884c\u67e5\u8a62\u3002\u9019\u6a23\u53ef\u4ee5\u9748\u6d3b\u5730\u8655\u7406\u4e0d\u540c\u7684\u5217\u540d\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u4f7f\u7528\u65b9\u62ec\u865f\u4f86\u62fc\u63a5 MSSQL \u5217\u540d\u662f\u4e00\u7a2e\u7c21\u55ae\u800c\u6709\u6548\u7684\u65b9\u6cd5\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5305\u542b\u7a7a\u683c\u6216\u7279\u6b8a\u5b57\u7b26\u7684\u5217\u540d\u6642\u3002\u901a\u904e\u672c\u6587\u7684\u4ecb\u7d39\uff0c\u60a8\u61c9\u8a72\u80fd\u5920\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5728 MSSQL \u4e2d\u4f7f\u7528\u65b9\u62ec\u865f\u4f86\u907f\u514d\u8a9e\u6cd5\u932f\u8aa4\uff0c\u4e26\u9748\u6d3b\u5730\u62fc\u63a5\u5217\u540d\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u7684\u6280\u8853\u652f\u6301\u6216\u5c0b\u627e\u5408\u9069\u7684 \u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3\u5982\u4f55\u4f7f\u7528\u65b9\u62ec\u53f7\u8f7b\u677e\u62fc\u63a5MSSQL\u5217\u540d\uff0c\u63d0\u5347\u6570\u636e\u5e93\u67e5\u8be2\u6548\u7387\uff0c\u907f\u514d\u547d\u540d\u51b2\u7a81\uff0c\u7b80\u5316SQL\u8bed\u53e5\u7f16\u5199\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-170647","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170647","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=170647"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170647\/revisions"}],"predecessor-version":[{"id":170648,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170647\/revisions\/170648"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=170647"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=170647"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=170647"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}