{"id":229,"date":"2011-02-01T10:51:02","date_gmt":"2011-02-01T02:51:02","guid":{"rendered":"http:\/\/www.royalwzy.com\/?p=229"},"modified":"2013-12-30T13:55:07","modified_gmt":"2013-12-30T05:55:07","slug":"sqlserver%e4%b8%ad%e6%97%a5%e6%9c%9f%e5%92%8c%e6%97%b6%e9%97%b4%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e5%8f%8a%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"http:\/\/www.royalwzy.com\/?p=229","title":{"rendered":"SqlServer\u4e2d\u65e5\u671f\u548c\u65f6\u95f4\u6570\u636e\u7c7b\u578b\u53ca\u51fd\u6570"},"content":{"rendered":"

\u65e5\u671f\u548c\u65f6\u95f4\u6570\u636e\u7c7b\u578b<\/strong><\/span><\/span><\/p>\n

\u4e0b\u8868\u5217\u51fa\u4e86<\/span>\u00a0Transact-SQL\u00a0<\/span>\u7684\u65e5\u671f\u548c\u65f6\u95f4\u6570\u636e\u7c7b\u578b<\/span>.<\/span><\/span><\/span><\/p>\n

\n\n\n\n\n\n\n\n\n\n
\n

\u6570\u636e\u7c7b\u578b<\/span><\/span><\/p>\n<\/td>\n

\n

\u683c\u5f0f<\/span><\/span><\/p>\n<\/td>\n

\n

\u8303\u56f4<\/span><\/span><\/p>\n<\/td>\n

\n

\u7cbe\u786e\u5ea6<\/span><\/span><\/p>\n<\/td>\n

\n

\u5b58\u50a8\u5927\u5c0f\uff08\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\uff09<\/span><\/span><\/p>\n<\/td>\n

\n

\u7528\u6237\u5b9a\u4e49\u7684\u79d2\u7684\u5c0f\u6570\u7cbe\u5ea6<\/span><\/span><\/p>\n<\/td>\n

\n

\u65f6\u533a\u504f\u79fb\u91cf<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

time<\/span><\/span><\/p>\n<\/td>\n

\n

hh:mm:ss[.nnnnnnn]<\/span><\/span><\/p>\n<\/td>\n

\n

00:00:00.0000000\u00a0<\/span>\u5230<\/span>23:59:59.9999999<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

100\u00a0<\/span>\u7eb3\u79d2<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

3\u00a0<\/span>\u5230<\/span>5<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u6709<\/span><\/span><\/p>\n<\/td>\n

\n

\u65e0<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

date<\/span><\/span><\/p>\n<\/td>\n

\n

YYYY-MM-DD<\/span><\/span><\/p>\n<\/td>\n

\n

0001-01-01\u00a0<\/span>\u5230<\/span>\u00a09999-12-31<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

1\u00a0<\/span>\u5929<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

3<\/span><\/span><\/p>\n<\/td>\n

\n

\u65e0<\/span><\/span><\/p>\n<\/td>\n

\n

\u65e0<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

smalldatetime<\/span><\/span><\/p>\n<\/td>\n

\n

YYYY-MM-DD hh:mm:ss<\/span><\/span><\/p>\n<\/td>\n

\n

1900-01-01\u00a0<\/span>\u5230<\/span>\u00a02079-06-06<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

1\u00a0<\/span>\u5206\u949f<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

4<\/span><\/span><\/p>\n<\/td>\n

\n

\u65e0<\/span><\/span><\/p>\n<\/td>\n

\n

\u65e0<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

datetime<\/span><\/span><\/p>\n<\/td>\n

\n

YYYY-MM-DD hh:mm:ss[.nnn]<\/span><\/span><\/p>\n<\/td>\n

\n

1753-01-01\u00a0<\/span>\u5230<\/span>\u00a09999-12-31<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

0.00333<\/span>\u79d2<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

8<\/span><\/span><\/p>\n<\/td>\n

\n

\u65e0<\/span><\/span><\/p>\n<\/td>\n

\n

\u65e0<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

datetime2<\/span><\/span><\/p>\n<\/td>\n

\n

YYYY-MM-DD hh:mm:ss[.nnnnnnn]<\/span><\/span><\/p>\n<\/td>\n

\n

0001-01-01 00:00:00.0000000\u00a0<\/span>\u5230<\/span>9999-12-31 23:59:59.9999999<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

100\u00a0<\/span>\u7eb3\u79d2<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

6\u00a0<\/span>\u5230<\/span>8<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u6709<\/span><\/span><\/p>\n<\/td>\n

\n

\u65e0<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

datetimeoffset<\/span><\/span><\/p>\n<\/td>\n

\n

YYYY-MM-DD hh:mm:ss[.nnnnnnn] [+|-]hh:mm<\/span><\/span><\/p>\n<\/td>\n

\n

0001-01-01 00:00:00.0000000\u00a0<\/span>\u5230<\/span>9999-12-31 23:59:59.9999999<\/span>\uff08\u4ee5<\/span>UTC\u00a0<\/span>\u65f6\u95f4\u8868\u793a\uff09<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

100\u00a0<\/span>\u7eb3\u79d2<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

8\u00a0<\/span>\u5230<\/span>10<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u6709<\/span><\/span><\/p>\n<\/td>\n

\n

\u6709<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u00a0<\/span><\/span><\/p>\n

\u6ce8\u610f<\/span>:<\/span>Transact-SQL rowversion\u00a0<\/span>\u6570\u636e\u7c7b\u578b\u4e0d\u662f\u65e5\u671f\u6216\u65f6\u95f4\u6570\u636e\u7c7b\u578b<\/span>.<\/span>timestamp<\/span>\u00a0<\/span>\u662f<\/span>\u00a0<\/span>rowversion<\/span>\u00a0<\/span>\u7684\u540c\u4e49\u8bcd<\/span>,<\/span>\u4f46\u4e0d\u63a8\u8350\u4f7f\u7528<\/span>.<\/span><\/span><\/span><\/p>\n

\u00a0<\/span><\/span><\/p>\n

\u65e5\u671f\u548c\u65f6\u95f4\u51fd\u6570<\/span><\/span><\/p>\n

\u7528\u6765\u83b7\u53d6\u7cfb\u7edf\u65e5\u671f\u548c\u65f6\u95f4\u503c\u7684\u51fd\u6570<\/span><\/span><\/p>\n

\u6240\u6709\u7cfb\u7edf\u65e5\u671f\u548c\u65f6\u95f4\u503c\u5747\u5f97\u81ea\u8fd0\u884c<\/span>\u00a0SQL Server\u00a0<\/span>\u5b9e\u4f8b\u7684\u8ba1\u7b97\u673a\u7684\u64cd\u4f5c\u7cfb\u7edf<\/span>.<\/span><\/span><\/span>
\n<\/span>\u7cbe\u5ea6\u8f83\u9ad8\u7684\u7cfb\u7edf\u65e5\u671f\u548c\u65f6\u95f4\u51fd\u6570<\/span><\/span><\/span><\/p>\n

SQL Server 2008\u00a0<\/span>\u4f7f\u7528<\/span>\u00a0<\/span>GetSystemTimeAsFileTime()<\/span>\u00a0Windows API\u00a0<\/span>\u6765\u83b7\u53d6\u65e5\u671f\u548c\u65f6\u95f4\u503c<\/span>.<\/span>\u7cbe\u786e\u7a0b\u5ea6\u53d6\u51b3\u4e8e\u8fd0\u884c<\/span>\u00a0SQL Server\u00a0<\/span>\u5b9e\u4f8b\u7684\u8ba1\u7b97\u673a\u786c\u4ef6\u548c<\/span>\u00a0Windows\u00a0<\/span>\u7248\u672c<\/span>.<\/span>\u6b64<\/span>\u00a0API\u00a0<\/span>\u7684\u7cbe\u5ea6\u56fa\u5b9a\u4e3a<\/span>\u00a0100\u00a0<\/span>\u7eb3\u79d2<\/span>.<\/span>\u53ef\u901a\u8fc7\u4f7f\u7528<\/span>\u00a0<\/span>GetSystemTimeAdjustment()<\/span>\u00a0Windows API\u00a0<\/span>\u6765\u786e\u5b9a\u8be5\u7cbe\u786e\u5ea6<\/span>.<\/span><\/span><\/span><\/p>\n

\n\n\n\n\n\n\n
\n

\u51fd\u6570<\/span><\/span><\/p>\n<\/td>\n

\n

\u8bed\u6cd5<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u503c<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u6570\u636e\u7c7b\u578b<\/span><\/span><\/p>\n<\/td>\n

\n

\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

SYSDATETIME<\/span><\/span><\/p>\n<\/td>\n

\n

SYSDATETIME ()<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u5305\u542b\u8ba1\u7b97\u673a\u7684\u65e5\u671f\u548c\u65f6\u95f4\u7684<\/span>\u00a0<\/span>datetime2(7)<\/span>\u503c<\/span>,SQL Server\u00a0<\/span>\u7684\u5b9e\u4f8b\u6b63\u5728\u8be5\u8ba1\u7b97\u673a\u4e0a\u8fd0\u884c<\/span>.<\/span>\u65f6\u533a\u504f\u79fb\u91cf\u672a\u5305\u542b\u5728\u5185<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

datetime2(7)<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

SYSDATETIMEOFFSET<\/span><\/span><\/p>\n<\/td>\n

\n

SYSDATETIMEOFFSET ( )<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u5305\u542b\u8ba1\u7b97\u673a\u7684\u65e5\u671f\u548c\u65f6\u95f4\u7684<\/span>datetimeoffset(7)<\/span>\u503c<\/span>,SQL Server\u00a0<\/span>\u7684\u5b9e\u4f8b\u6b63\u5728\u8be5\u8ba1\u7b97\u673a\u4e0a\u8fd0\u884c<\/span>.<\/span>\u65f6\u533a\u504f\u79fb\u91cf\u5305\u542b\u5728\u5185<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

datetimeoffset(7)<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

SYSUTCDATETIME<\/span><\/span><\/p>\n<\/td>\n

\n

SYSUTCDATETIME ( )<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u5305\u542b\u8ba1\u7b97\u673a\u7684\u65e5\u671f\u548c\u65f6\u95f4\u7684<\/span>\u00a0<\/span>datetime2(7)<\/span>\u503c<\/span>,SQL Server\u00a0<\/span>\u7684\u5b9e\u4f8b\u6b63\u5728\u8be5\u8ba1\u7b97\u673a\u4e0a\u8fd0\u884c<\/span>.<\/span>\u65e5\u671f\u548c\u65f6\u95f4\u4f5c\u4e3a<\/span>\u00a0UTC\u00a0<\/span>\u65f6\u95f4\uff08\u901a\u7528\u534f\u8c03\u65f6\u95f4\uff09\u8fd4\u56de<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

datetime2(7)<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n


\n<\/span>\u7cbe\u5ea6\u8f83\u4f4e\u7684\u7cfb\u7edf\u65e5\u671f\u548c\u65f6\u95f4\u51fd\u6570<\/span><\/span><\/span><\/p>\n

\n\n\n\n\n\n\n
\n

\u51fd\u6570<\/span><\/span><\/p>\n<\/td>\n

\n

\u8bed\u6cd5<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u503c<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u6570\u636e\u7c7b\u578b<\/span><\/span><\/p>\n<\/td>\n

\n

\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

CURRENT_TIMESTAMP<\/span><\/span><\/p>\n<\/td>\n

\n

CURRENT_TIMESTAMP<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u5305\u542b\u8ba1\u7b97\u673a\u7684\u65e5\u671f\u548c\u65f6\u95f4\u7684<\/span>datetime2(7)<\/span>\u00a0<\/span>\u503c<\/span>,SQL Server<\/span>\u7684\u5b9e\u4f8b\u6b63\u5728\u8be5\u8ba1\u7b97\u673a\u4e0a\u8fd0\u884c<\/span>.<\/span>\u65f6\u533a\u504f\u79fb\u91cf\u672a\u5305\u542b\u5728\u5185<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

datetime<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

GETDATE<\/span><\/span><\/p>\n<\/td>\n

\n

GETDATE ( )<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u5305\u542b\u8ba1\u7b97\u673a\u7684\u65e5\u671f\u548c\u65f6\u95f4\u7684<\/span>datetime2(7)<\/span>\u00a0<\/span>\u503c<\/span>,SQL Server<\/span>\u7684\u5b9e\u4f8b\u6b63\u5728\u8be5\u8ba1\u7b97\u673a\u4e0a\u8fd0\u884c<\/span>.<\/span>\u65f6\u533a\u504f\u79fb\u91cf\u672a\u5305\u542b\u5728\u5185<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

datetime<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

GETUTCDATE<\/span><\/span><\/p>\n<\/td>\n

\n

GETUTCDATE ( )<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u5305\u542b\u8ba1\u7b97\u673a\u7684\u65e5\u671f\u548c\u65f6\u95f4\u7684<\/span>datetime2(7)<\/span>\u00a0<\/span>\u503c<\/span>,SQL Server<\/span>\u7684\u5b9e\u4f8b\u6b63\u5728\u8be5\u8ba1\u7b97\u673a\u4e0a\u8fd0\u884c<\/span>.<\/span>\u65e5\u671f\u548c\u65f6\u95f4\u4f5c\u4e3a<\/span>\u00a0UTC\u00a0<\/span>\u65f6\u95f4\uff08\u901a\u7528\u534f\u8c03\u65f6\u95f4\uff09\u8fd4\u56de<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

datetime<\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u7528\u6765\u83b7\u53d6\u65e5\u671f\u548c\u65f6\u95f4\u90e8\u5206\u7684\u51fd\u6570<\/span><\/span><\/p>\n

\n\n\n\n\n\n\n\n\n
\n

\u51fd\u6570<\/span><\/span><\/p>\n<\/td>\n

\n

\u8bed\u6cd5<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u503c<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u6570\u636e\u7c7b\u578b<\/span><\/span><\/p>\n<\/td>\n

\n

\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

DATENAME<\/span><\/span><\/p>\n<\/td>\n

\n

DATENAME (\u00a0datepart<\/span>,\u00a0date<\/span>\u00a0)<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u8868\u793a\u6307\u5b9a\u65e5\u671f\u7684\u6307\u5b9a<\/span>datepart<\/span>\u00a0<\/span>\u7684\u5b57\u7b26\u4e32<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

nvarchar<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

DATEPART<\/span><\/span><\/p>\n<\/td>\n

\n

DATEPART (\u00a0datepart<\/span>,\u00a0date<\/span>\u00a0)<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u8868\u793a\u6307\u5b9a<\/span>\u00a0<\/span>date<\/span>\u00a0<\/span>\u7684\u6307\u5b9a<\/span>datepart<\/span>\u00a0<\/span>\u7684\u6574\u6570<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

int<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

DAY<\/span><\/span><\/p>\n<\/td>\n

\n

DAY (\u00a0date<\/span>\u00a0)<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u8868\u793a\u6307\u5b9a<\/span>\u00a0<\/span>date<\/span>\u00a0<\/span>\u7684<\/span>“<\/span>\u65e5<\/span>“<\/span>\u90e8\u5206\u7684\u6574\u6570<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

int<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

MONTH<\/span><\/span><\/p>\n<\/td>\n

\n

MONTH (\u00a0date<\/span>\u00a0)<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u8868\u793a\u6307\u5b9a<\/span>\u00a0<\/span>date<\/span>\u00a0<\/span>\u7684<\/span>“<\/span>\u6708<\/span>“<\/span>\u90e8\u5206\u7684\u6574\u6570<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

int<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

YEAR<\/span><\/span><\/p>\n<\/td>\n

\n

YEAR (\u00a0date<\/span>\u00a0)<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u8868\u793a\u6307\u5b9a<\/span>\u00a0<\/span>date<\/span>\u00a0<\/span>\u7684<\/span>“<\/span>\u5e74<\/span>“<\/span>\u90e8\u5206\u7684\u6574\u6570<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

int<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u7528\u6765\u83b7\u53d6\u65e5\u671f\u548c\u65f6\u95f4\u5dee\u7684\u51fd\u6570<\/span><\/span><\/p>\n

\n\n\n\n\n
\n

\u51fd\u6570<\/span><\/span><\/p>\n<\/td>\n

\n

\u8bed\u6cd5<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u503c<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u6570\u636e\u7c7b\u578b<\/span><\/span><\/p>\n<\/td>\n

\n

\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

DATEDIFF<\/span><\/span><\/p>\n<\/td>\n

\n

DATEDIFF (\u00a0datepart<\/span>\u00a0,startdate<\/span>\u00a0,\u00a0enddate<\/span>\u00a0)<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u4e24\u4e2a\u6307\u5b9a\u65e5\u671f\u4e4b\u95f4\u6240\u8de8\u7684\u65e5\u671f\u6216\u65f6\u95f4<\/span>\u00a0<\/span>datepart<\/span>\u00a0<\/span>\u8fb9\u754c\u7684\u6570\u76ee<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

int<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u7528\u6765\u4fee\u6539\u65e5\u671f\u548c\u65f6\u95f4\u503c\u7684\u51fd\u6570<\/span><\/span><\/p>\n

\n\n\n\n\n\n\n
\n

\u51fd\u6570<\/span><\/span><\/p>\n<\/td>\n

\n

\u8bed\u6cd5<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u503c<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u6570\u636e\u7c7b\u578b<\/span><\/span><\/p>\n<\/td>\n

\n

\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

DATEADD<\/span><\/span><\/p>\n<\/td>\n

\n

DATEADD (datepart<\/span>,\u00a0number\u00a0<\/span>,\u00a0date<\/span>\u00a0)<\/span><\/span><\/p>\n<\/td>\n

\n

\u901a\u8fc7\u5c06\u4e00\u4e2a\u65f6\u95f4\u95f4\u9694\u4e0e\u6307\u5b9a<\/span>date<\/span>\u00a0<\/span>\u7684\u6307\u5b9a<\/span>\u00a0<\/span>datepart<\/span>\u76f8\u52a0<\/span>,<\/span>\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684<\/span>datetime<\/span>\u00a0<\/span>\u503c<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

date<\/span>\u00a0<\/span>\u53c2\u6570\u7684\u6570\u636e\u7c7b\u578b<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

SWITCHOFFSET<\/span><\/span><\/p>\n<\/td>\n

\n

SWITCHOFFSET<\/span>(DATETIMEOFFSET\u00a0<\/span>,time_zone<\/span>)<\/span><\/span><\/p>\n<\/td>\n

\n

SWITCH\u00a0<\/span>OFFSET<\/span>\u00a0<\/span>\u66f4\u6539<\/span>DATETIMEOFFSET\u00a0<\/span>\u503c\u7684\u65f6\u533a\u504f\u79fb\u91cf\u5e76\u4fdd\u7559<\/span>\u00a0UTC\u00a0<\/span>\u503c<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u5177\u6709<\/span>DATETIMEOFFSET<\/span>\u7684\u5c0f\u6570\u7cbe\u5ea6\u7684<\/span>datetimeoffset<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

TODATETIMEOFFSET<\/span><\/span><\/p>\n<\/td>\n

\n

TODATETIMEOFFSET (expression\u00a0<\/span>,time_zone<\/span>)<\/span><\/span><\/p>\n<\/td>\n

\n

TODATETIMEOFFSET\u00a0<\/span>\u5c06<\/span>datetime2\u00a0<\/span>\u503c\u8f6c\u6362\u4e3a<\/span>datetimeoffset<\/span>\u503c<\/span>.datetime2\u00a0<\/span>\u503c\u88ab\u89e3\u91ca\u4e3a\u6307\u5b9a<\/span>\u00a0time_zone\u00a0<\/span>\u7684\u672c\u5730\u65f6\u95f4<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u5177\u6709<\/span>\u00a0<\/span>datetime<\/span>\u00a0<\/span>\u53c2\u6570\u7684\u5c0f\u6570\u7cbe\u5ea6\u7684<\/span>datetimeoffset<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u7528\u6765\u8bbe\u7f6e\u6216\u83b7\u53d6\u4f1a\u8bdd\u683c\u5f0f\u7684\u51fd\u6570<\/span><\/span><\/p>\n

\n\n\n\n\n\n\n\n\n\n
\n

\u51fd\u6570<\/span><\/span><\/p>\n<\/td>\n

\n

\u8bed\u6cd5<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u503c<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u6570\u636e\u7c7b\u578b<\/span><\/span><\/p>\n<\/td>\n

\n

\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

@@DATEFIRST<\/span><\/span><\/p>\n<\/td>\n

\n

@@DATEFIRST<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u5bf9\u4f1a\u8bdd\u8fdb\u884c<\/span>\u00a0SET DATEFIRST<\/span>\u64cd\u4f5c\u6240\u5f97\u7ed3\u679c\u7684\u5f53\u524d\u503c<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

tinyint<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u5177\u6709\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

SET DATEFIRST<\/span><\/span><\/p>\n<\/td>\n

\n

SET DATEFIRST {number<\/span>\u00a0|@<\/span>number_var<\/span>\u00a0}<\/span><\/span><\/p>\n<\/td>\n

\n

\u5c06\u4e00\u5468\u7684\u7b2c\u4e00\u5929\u8bbe\u7f6e\u4e3a\u4ece<\/span>\u00a01\u00a0<\/span>\u5230<\/span>\u00a07\u00a0<\/span>\u7684\u4e00\u4e2a\u6570\u5b57<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u9002\u7528<\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u9002\u7528<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

SET DATEFORMAT<\/span><\/span><\/p>\n<\/td>\n

\n

SET DATEFORMAT {format<\/span>\u00a0|@<\/span>format_var<\/span>\u00a0}<\/span><\/span><\/p>\n<\/td>\n

\n

\u8bbe\u7f6e\u7528\u4e8e\u8f93\u5165<\/span>\u00a0<\/span>datetime<\/span>\u00a0<\/span>\u6216<\/span>smalldatetime<\/span>\u00a0<\/span>\u6570\u636e\u7684\u65e5\u671f\u5404\u90e8\u5206\uff08\u6708<\/span>\/<\/span>\u65e5<\/span>\/<\/span>\u5e74\uff09\u7684\u987a\u5e8f<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u9002\u7528<\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u9002\u7528<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

@@LANGUAGE<\/span><\/span><\/p>\n<\/td>\n

\n

@@LANGUAGE<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u5f53\u524d\u4f7f\u7528\u7684\u8bed\u8a00\u7684\u540d\u79f0<\/span>.@@LANGUAGE\u00a0<\/span>\u4e0d\u662f\u65e5\u671f\u6216\u65f6\u95f4\u51fd\u6570<\/span>.<\/span>\u4f46\u662f<\/span>,<\/span>\u8bed\u8a00\u8bbe\u7f6e\u4f1a\u5f71\u54cd\u65e5\u671f\u51fd\u6570\u7684\u8f93\u51fa<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u9002\u7528<\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u9002\u7528<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

SET LANGUAGE<\/span><\/span><\/p>\n<\/td>\n

\n

SET LANGUAGE { [ N ]\u00a0‘<\/span>language<\/span>‘<\/span>\u00a0|@<\/span>language_var<\/span>\u00a0}<\/span><\/span><\/p>\n<\/td>\n

\n

\u8bbe\u7f6e\u4f1a\u8bdd\u548c\u7cfb\u7edf\u6d88\u606f\u7684\u8bed\u8a00\u73af\u5883<\/span>.SET LANGUAGE\u00a0<\/span>\u4e0d\u662f\u65e5\u671f\u6216\u65f6\u95f4\u51fd\u6570<\/span>.<\/span>\u4f46\u662f<\/span>,<\/span>\u8bed\u8a00\u8bbe\u7f6e\u4f1a\u5f71\u54cd\u65e5\u671f\u51fd\u6570\u7684\u8f93\u51fa<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u9002\u7528<\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u9002\u7528<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

sp_helplanguage<\/span><\/span><\/p>\n<\/td>\n

\n

sp_helplanguage<\/span>\u00a0[ [@language =<\/span>\u00a0]‘<\/span>language<\/span>‘<\/span>\u00a0]<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u6709\u5173\u6240\u6709\u652f\u6301\u8bed\u8a00\u65e5\u671f\u683c\u5f0f\u7684\u4fe1\u606f<\/span>.<\/span>sp_helplanguage<\/span>\u00a0<\/span>\u4e0d\u662f\u65e5\u671f\u6216\u65f6\u95f4\u5b58\u50a8\u8fc7\u7a0b<\/span>.<\/span>\u4f46\u662f<\/span>,<\/span>\u8bed\u8a00\u8bbe\u7f6e\u4f1a\u5f71\u54cd\u65e5\u671f\u51fd\u6570\u7684\u8f93\u51fa<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u9002\u7528<\/span><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u9002\u7528<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u7528\u6765\u9a8c\u8bc1\u65e5\u671f\u548c\u65f6\u95f4\u503c\u7684\u51fd\u6570<\/span><\/span><\/p>\n

\n\n\n\n\n
\n

\u51fd\u6570<\/span><\/span><\/p>\n<\/td>\n

\n

\u8bed\u6cd5<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u503c<\/span><\/span><\/p>\n<\/td>\n

\n

\u8fd4\u56de\u6570\u636e\u7c7b\u578b<\/span><\/span><\/p>\n<\/td>\n

\n

\u786e\u5b9a\u6027<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

ISDATE<\/span><\/span><\/p>\n<\/td>\n

\n

ISDATE (expression<\/span>\u00a0)<\/span><\/span><\/p>\n<\/td>\n

\n

\u786e\u5b9a<\/span>\u00a0<\/span>datetime<\/span>\u00a0<\/span>\u6216<\/span>smalldatetime<\/span>\u00a0<\/span>\u8f93\u5165\u8868\u8fbe\u5f0f\u662f\u5426\u4e3a\u6709\u6548\u7684\u65e5\u671f\u6216\u65f6\u95f4\u503c<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

int<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u53ea\u6709\u4e0e<\/span>\u00a0CONVERT\u00a0<\/span>\u51fd\u6570\u4e00\u8d77\u4f7f\u7528<\/span>,<\/span>\u540c\u65f6\u6307\u5b9a\u4e86<\/span>\u00a0CONVERT\u00a0<\/span>\u6837\u5f0f\u53c2\u6570\u4e14\u6837\u5f0f\u4e0d\u7b49\u4e8e<\/span>\u00a00,100,9\u00a0<\/span>\u6216<\/span>\u00a0109<\/span>\u65f6<\/span>,ISDATE\u00a0<\/span>\u624d\u662f\u786e\u5b9a\u7684<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u00a0<\/span><\/p>\n

\u65e5\u671f\u548c\u65f6\u95f4\u76f8\u5173\u4e3b\u9898<\/span><\/span><\/p>\n

\n\n\n\n\n\n\n\n\n
\n

\u4e3b\u9898<\/span><\/span><\/p>\n<\/td>\n

\n

\u8bf4\u660e<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\u4f7f\u7528\u65e5\u671f\u548c\u65f6\u95f4\u6570\u636e<\/span><\/span><\/p>\n<\/td>\n

\n

\u63d0\u4f9b\u901a\u7528\u4e8e\u65e5\u671f\u548c\u65f6\u95f4\u6570\u636e\u7c7b\u578b\u53ca\u51fd\u6570\u7684\u4fe1\u606f\u548c\u793a\u4f8b<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

CAST\u00a0<\/span>\u548c<\/span>\u00a0CONVERT (Transact-SQL)<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u63d0\u4f9b\u6709\u5173\u5728\u65e5\u671f\u548c\u65f6\u95f4\u503c\u4e0e\u5b57\u7b26\u4e32\u6587\u5b57\u53ca\u5176\u4ed6\u65e5\u671f\u548c\u65f6\u95f4\u683c\u5f0f\u4e4b\u95f4\u8fdb\u884c\u76f8\u4e92\u8f6c\u6362\u7684\u4fe1\u606f<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\u7f16\u5199\u56fd\u9645\u5316<\/span>\u00a0Transact-SQL\u00a0<\/span>\u8bed\u53e5<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u63d0\u4f9b\u4f7f\u7528<\/span>\u00a0Transact-SQL\u00a0<\/span>\u8bed\u53e5\u7684\u6570\u636e\u5e93\u548c\u6570\u636e\u5e93\u5e94\u7528\u7a0b\u5e8f\u5728\u4e0d\u540c\u8bed\u8a00\u4e4b\u95f4\u7684\u53ef\u79fb\u690d\u6027\u51c6\u5219<\/span>,<\/span>\u6216\u652f\u6301\u591a\u79cd\u8bed\u8a00\u7684\u6570\u636e\u5e93\u548c\u6570\u636e\u5e93\u5e94\u7528\u7a0b\u5e8f\u7684\u53ef\u79fb\u690d\u6027\u51c6\u5219<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

ODBC\u00a0<\/span>\u6807\u91cf\u51fd\u6570<\/span>(Transact-SQL)<\/span><\/span><\/span><\/p>\n<\/td>\n

\n

\u63d0\u4f9b\u6709\u5173\u53ef\u5728<\/span>\u00a0Transact-SQL\u00a0<\/span>\u8bed\u53e5\u4e2d\u4f7f\u7528\u7684<\/span>\u00a0ODBC\u00a0<\/span>\u6807\u91cf\u51fd\u6570\u7684\u4fe1\u606f<\/span>.<\/span>\u8fd9\u5305\u62ec<\/span>ODBC\u00a0<\/span>\u65e5\u671f\u548c\u65f6\u95f4\u51fd\u6570<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\u5206\u5e03\u5f0f\u67e5\u8be2\u7684\u6570\u636e\u7c7b\u578b\u6620\u5c04<\/span><\/span><\/p>\n<\/td>\n

\n

\u63d0\u4f9b\u6709\u5173\u4ee5\u4e0b\u65b9\u9762\u7684\u4fe1\u606f<\/span>:<\/span>\u65e5\u671f\u548c\u65f6\u95f4\u6570\u636e\u7c7b\u578b\u5bf9\u5177\u6709\u4e0d\u540c\u7248\u672c\u7684<\/span>\u00a0SQL Server\u00a0<\/span>\u6216\u4e0d\u540c\u8bbf\u95ee\u63a5\u53e3\u7684\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u5206\u5e03\u5f0f\u67e5\u8be2\u6709\u4f55\u5f71\u54cd<\/span>.<\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\u65e5\u671f\u548c\u65f6\u95f4\u6570\u636e\u7c7b\u578b \u4e0b\u8868\u5217\u51fa\u4e86\u00a0Transact-SQL\u00a0\u7684\u65e5\u671f\u548c\u65f6\u95f4\u6570\u636e\u7c7b\u578b. \u6570\u636e\u7c7b\u578b \u683c\u5f0f \u8303\u56f4 \u7cbe\u786e\u5ea6 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[16],"class_list":["post-229","post","type-post","status-publish","format-standard","hentry","category-sqlserver","tag-sql_server_2008_r2"],"_links":{"self":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/posts\/229","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=229"}],"version-history":[{"count":0,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/posts\/229\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=229"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=229"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=229"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}