{"id":138893,"date":"2024-10-31T16:11:16","date_gmt":"2024-10-31T08:11:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/138893\/"},"modified":"2024-10-31T16:11:16","modified_gmt":"2024-10-31T08:11:16","slug":"sql-server%e8%a8%88%e7%ae%97%e5%b9%b4%e4%bb%bd%e7%9a%84%e5%a4%a9%e6%95%b8%ef%bc%88sqlserver%e5%b9%b4%e5%a4%a9%e6%95%b8%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/138893\/","title":{"rendered":"SQL Server\u8a08\u7b97\u5e74\u4efd\u7684\u5929\u6578\uff08sqlserver\u5e74\u5929\u6578\uff09"},"content":{"rendered":"

SQL Server\u8a08\u7b97\u5e74\u4efd\u7684\u5929\u6578\uff08sqlserver\u5e74\u5929\u6578\uff09<\/h1>\n

\u5728\u4f7f\u7528SQL Server\u9032\u884c\u6578\u64da\u7ba1\u7406\u548c\u5206\u6790\u6642\uff0c\u8a08\u7b97\u5e74\u4efd\u7684\u5929\u6578\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u9019\u4e0d\u50c5\u5c0d\u65bc\u8ca1\u52d9\u5831\u8868\u7684\u751f\u6210\u81f3\u95dc\u91cd\u8981\uff0c\u9084\u5c0d\u65bc\u8a31\u591a\u5176\u4ed6\u61c9\u7528\u5834\u666f\uff0c\u5982\u5831\u544a\u751f\u6210\u3001\u6578\u64da\u5206\u6790\u7b49\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728SQL Server\u4e2d\u8a08\u7b97\u5e74\u4efd\u7684\u5929\u6578\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u7bc4\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

\u5e74\u4efd\u7684\u5929\u6578\u6982\u8ff0<\/h2>\n

\u901a\u5e38\uff0c\u4e00\u5e74\u6709365\u5929\uff0c\u4f46\u5728\u958f\u5e74\u4e2d\uff0c\u5247\u6709366\u5929\u3002\u958f\u5e74\u7684\u8a08\u7b97\u898f\u5247\u662f\uff1a\u5982\u679c\u5e74\u4efd\u80fd\u88ab4\u6574\u9664\uff0c\u5247\u70ba\u958f\u5e74\uff1b\u4f46\u5982\u679c\u8a72\u5e74\u4efd\u80fd\u88ab100\u6574\u9664\uff0c\u5247\u5fc5\u9808\u540c\u6642\u80fd\u88ab400\u6574\u9664\uff0c\u624d\u7b97\u4f5c\u958f\u5e74\u3002\u9019\u610f\u5473\u84571900\u5e74\u4e0d\u662f\u958f\u5e74\uff0c\u800c2000\u5e74\u5247\u662f\u958f\u5e74\u3002<\/p>\n

\u5728SQL Server\u4e2d\u8a08\u7b97\u5e74\u4efd\u7684\u5929\u6578<\/h2>\n

\u5728SQL Server\u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u5167\u5efa\u7684\u51fd\u6578\u4f86\u8a08\u7b97\u7279\u5b9a\u5e74\u4efd\u7684\u5929\u6578\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u65b9\u6cd5\uff1a<\/p>\n

\u4f7f\u7528DATEDIFF\u51fd\u6578<\/h3>\n

\u6211\u5011\u53ef\u4ee5\u4f7f\u7528DATEDIFF<\/code>\u51fd\u6578\u4f86\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5929\u6578\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u8a08\u7b97\u67d0\u4e00\u5e74\uff08\u4f8b\u59822023\u5e74\uff09\u7684\u5929\u6578\uff1a<\/p>\n

DECLARE @Year INT = 2023;\nDECLARE @StartDate DATE = CAST(CONCAT(@Year, '-01-01') AS DATE);\nDECLARE @EndDate DATE = CAST(CONCAT(@Year, '-12-31') AS DATE);\n\nSELECT DATEDIFF(DAY, @StartDate, @EndDate) + 1 AS TotalDays;\n<\/code><\/pre>\n
\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5b9a\u7fa9\u4e86\u5e74\u4efd\uff0c\u7136\u5f8c\u5275\u5efa\u4e86\u8a72\u5e74\u4efd\u7684\u958b\u59cb\u548c\u7d50\u675f\u65e5\u671f\u3002\u63a5\u8457\uff0c\u6211\u5011\u4f7f\u7528DATEDIFF<\/code>\u51fd\u6578\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5929\u6578\uff0c\u4e26\u52a01\u4ee5\u5305\u542b\u958b\u59cb\u65e5\u671f\u3002<\/p>\n
\u4f7f\u7528CASE\u8a9e\u53e5\u5224\u65b7\u958f\u5e74<\/h3>\n
\u53e6\u4e00\u7a2e\u65b9\u6cd5\u662f\u4f7f\u7528CASE<\/code>\u8a9e\u53e5\u4f86\u5224\u65b7\u662f\u5426\u70ba\u958f\u5e74\uff0c\u5f9e\u800c\u6c7a\u5b9a\u5929\u6578\uff1a<\/p>\n
DECLARE @Year INT = 2023;\n\nSELECT \n    CASE \n        WHEN (@Year % 4 = 0 AND @Year % 100 != 0) OR (@Year % 400 = 0) \n        THEN 366 \n        ELSE 365 \n    END AS TotalDays;\n<\/code><\/pre>\n
\u9019\u6bb5\u4ee3\u78bc\u901a\u904e\u6aa2\u67e5\u5e74\u4efd\u662f\u5426\u7b26\u5408\u958f\u5e74\u7684\u689d\u4ef6\uff0c\u8fd4\u56de\u76f8\u61c9\u7684\u5929\u6578\u3002<\/p>\n
\u5be6\u969b\u61c9\u7528\u5834\u666f<\/h2>\n
\u8a08\u7b97\u5e74\u4efd\u7684\u5929\u6578\u5728\u8a31\u591a\u5be6\u969b\u61c9\u7528\u4e2d\u90fd\u975e\u5e38\u91cd\u8981\u3002\u4f8b\u5982\uff0c\u5728\u8ca1\u52d9\u5831\u8868\u4e2d\uff0c\u6e96\u78ba\u7684\u5929\u6578\u8a08\u7b97\u53ef\u4ee5\u5e6b\u52a9\u4f01\u696d\u66f4\u597d\u5730\u9032\u884c\u9810\u7b97\u7de8\u5236\u548c\u8cc7\u91d1\u6d41\u52d5\u5206\u6790\u3002\u6b64\u5916\uff0c\u5728\u6578\u64da\u5206\u6790\u4e2d\uff0c\u4e86\u89e3\u6bcf\u5e74\u7684\u5929\u6578\u4e5f\u6709\u52a9\u65bc\u9032\u884c\u6642\u9593\u5e8f\u5217\u5206\u6790\u548c\u8da8\u52e2\u9810\u6e2c\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728SQL Server\u4e2d\u8a08\u7b97\u5e74\u4efd\u7684\u5929\u6578\u662f\u4e00\u500b\u76f8\u5c0d\u7c21\u55ae\u7684\u904e\u7a0b\uff0c\u7121\u8ad6\u662f\u4f7f\u7528DATEDIFF<\/code>\u51fd\u6578\u9084\u662fCASE<\/code>\u8a9e\u53e5\uff0c\u90fd\u80fd\u6709\u6548\u5730\u7372\u5f97\u6240\u9700\u7684\u7d50\u679c\u3002\u9019\u4e9b\u6280\u8853\u4e0d\u50c5\u9069\u7528\u65bc\u55ae\u4e00\u5e74\u4efd\u7684\u8a08\u7b97\uff0c\u9084\u53ef\u4ee5\u64f4\u5c55\u5230\u591a\u500b\u5e74\u4efd\u7684\u5206\u6790\u4e2d\u3002<\/p>\n
\u5982\u679c\u60a8\u9700\u8981\u66f4\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u548c\u5206\u6790\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u696d\u52d9\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u548c\u9748\u6d3b\u7684\u8cc7\u6e90\u914d\u7f6e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3\u5982\u4f55\u5728SQL Server\u4e2d\u8a08\u7b97\u5e74\u4efd\u7684\u5929\u6578\uff0c\u638c\u63e1\u5e74\u5929\u6578\u7684\u67e5\u8a62\u6280\u5de7\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-138893","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138893","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=138893"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138893\/revisions"}],"predecessor-version":[{"id":138894,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138893\/revisions\/138894"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=138893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=138893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=138893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}