CONVERT(data_type,expression[,style])
说明:
此样式一般在时间类型(datetime,smalldatetime)与字符串类型(nchar,nvarchar,char,varchar)
相互转换的时候才用到.
例子:
SELECT CONVERT(varchar(30),getdate(),101) Now
结果为:
Now
---------------------------------------
|09/15/2001
===================================================================
style数字在转换时间时的含义如下:
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Style(2位表示年份) | Style(4位表示年份) | 输入输出格式
------------------------------------------------------------------------------------------------------------
0 | 100 | mon dd yyyy hh:miAM(或PM)
------------------------------------------------------------------------------------------------------------
1 | 101 美国 | mm/dd/yy
------------------------------------------------------------------------------------------------------------
2 | 102 ANSI | yy-mm-dd
------------------------------------------------------------------------------------------------------------
3 | 103 英法 | dd/mm/yy
------------------------------------------------------------------------------------------------------------
4 | 104 德国 | dd.mm.yy
------------------------------------------------------------------------------------------------------------
5 | 105 意大利 | dd-mm-yy
------------------------------------------------------------------------------------------------------------
6 | 106 | dd mon yy
------------------------------------------------------------------------------------------------------------
7 | 107 | mon dd,yy
------------------------------------------------------------------------------------------------------------
8 | 108 | hh:mm:ss
------------------------------------------------------------------------------------------------------------
9 | 109 | mon dd yyyy hh:mi:ss:mmmmAM(或PM)
------------------------------------------------------------------------------------------------------------
10 | 110 美国 | mm-dd-yy
------------------------------------------------------------------------------------------------------------
11 | 111 日本 | yy/mm/dd
------------------------------------------------------------------------------------------------------------
12 | 112 ISO | yymmdd
------------------------------------------------------------------------------------------------------------
13 | 113 欧洲默认值 | dd mon yyyy hh:mi:ss:mmm(24小时制)
------------------------------------------------------------------------------------------------------------
14 | 114 | hh:mi:ss:mmm(24小时制)
------------------------------------------------------------------------------------------------------------
20 | 120 ODBC 规范 | yyyy-mm-dd hh:mi:ss(24小时制)
------------------------------------------------------------------------------------------------------------
21 | 121 | yyyy-mm-dd hh:mi:ss:mmm(24小时制)
------------------------------------------------------------------------------------------------------------
语句及查询结果： SELECT CONVERT(varchar(100),GETDATE(),0): 05 16 2006 10:57AM SELECT CONVERT(varchar(100),1): 05/16/06 SELECT CONVERT(varchar(100),2): 06.05.16 SELECT CONVERT(varchar(100),3): 16/05/06 SELECT CONVERT(varchar(100),4): 16.05.06 SELECT CONVERT(varchar(100),5): 16-05-06 SELECT CONVERT(varchar(100),6): 16 05 06 SELECT CONVERT(varchar(100),7): 05 16,06 SELECT CONVERT(varchar(100),8): 10:57:46 SELECT CONVERT(varchar(100),9): 05 16 2006 10:57:46:827AM SELECT CONVERT(varchar(100),10): 05-16-06 SELECT CONVERT(varchar(100),11): 06/05/16 SELECT CONVERT(varchar(100),12): 060516 SELECT CONVERT(varchar(100),13): 16 05 2006 10:57:46:937 SELECT CONVERT(varchar(100),14): 10:57:46:967 SELECT CONVERT(varchar(100),20): 2006-05-16 10:57:47 SELECT CONVERT(varchar(100),21): 2006-05-16 10:57:47.157 SELECT CONVERT(varchar(100),22): 05/16/06 10:57:47 AM SELECT CONVERT(varchar(100),23): 2006-05-16 SELECT CONVERT(varchar(100),24): 10:57:47 SELECT CONVERT(varchar(100),25): 2006-05-16 10:57:47.250 SELECT CONVERT(varchar(100),100): 05 16 2006 10:57AM SELECT CONVERT(varchar(100),101): 05/16/2006 SELECT CONVERT(varchar(100),102): 2006.05.16 SELECT CONVERT(varchar(100),103): 16/05/2006 SELECT CONVERT(varchar(100),104): 16.05.2006 SELECT CONVERT(varchar(100),105): 16-05-2006 SELECT CONVERT(varchar(100),106): 16 05 2006 SELECT CONVERT(varchar(100),107): 05 16,2006 SELECT CONVERT(varchar(100),108): 10:57:49 SELECT CONVERT(varchar(100),109): 05 16 2006 10:57:49:437AM SELECT CONVERT(varchar(100),110): 05-16-2006 SELECT CONVERT(varchar(100),111): 2006/05/16 SELECT CONVERT(varchar(100),112): 20060516 SELECT CONVERT(varchar(100),113): 16 05 2006 10:57:49:513 SELECT CONVERT(varchar(100),114): 10:57:49:547 SELECT CONVERT(varchar(100),120): 2006-05-16 10:57:49
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