SQL convert datetime

格式:

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:

------------------------------------------------------------------------------------------------------------

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) 

SELECT CONVERT(varchar(100), GETDATE(), 0): 05 16 2006 10:57AM

SELECT CONVERT(varchar(100), GETDATE(), 1): 05/16/06

SELECT CONVERT(varchar(100), GETDATE(), 2): 06.05.16

SELECT CONVERT(varchar(100), GETDATE(), 3): 16/05/06

SELECT CONVERT(varchar(100), GETDATE(), 4): 16.05.06

SELECT CONVERT(varchar(100), GETDATE(), 5): 16-05-06

SELECT CONVERT(varchar(100), GETDATE(), 6): 16 05 06

SELECT CONVERT(varchar(100), GETDATE(), 7): 05 16, 06

SELECT CONVERT(varchar(100), GETDATE(), 8): 10:57:46

SELECT CONVERT(varchar(100), GETDATE(), 9): 05 16 2006 10:57:46:827AM

SELECT CONVERT(varchar(100), GETDATE(), 10): 05-16-06

SELECT CONVERT(varchar(100), GETDATE(), 11): 06/05/16

SELECT CONVERT(varchar(100), GETDATE(), 12): 060516

SELECT CONVERT(varchar(100), GETDATE(), 13): 16 05 2006 10:57:46:937

SELECT CONVERT(varchar(100), GETDATE(), 14): 10:57:46:967

SELECT CONVERT(varchar(100), GETDATE(), 20): 2006-05-16 10:57:47

SELECT CONVERT(varchar(100), GETDATE(), 21): 2006-05-16 10:57:47.157

SELECT CONVERT(varchar(100), GETDATE(), 22): 05/16/06 10:57:47 AM

SELECT CONVERT(varchar(100), GETDATE(), 23): 2006-05-16

SELECT CONVERT(varchar(100), GETDATE(), 24): 10:57:47

SELECT CONVERT(varchar(100), GETDATE(), 25): 2006-05-16 10:57:47.250

SELECT CONVERT(varchar(100), GETDATE(), 100): 05 16 2006 10:57AM

SELECT CONVERT(varchar(100), GETDATE(), 101): 05/16/2006

SELECT CONVERT(varchar(100), GETDATE(), 102): 2006.05.16

SELECT CONVERT(varchar(100), GETDATE(), 103): 16/05/2006

SELECT CONVERT(varchar(100), GETDATE(), 104): 16.05.2006

SELECT CONVERT(varchar(100), GETDATE(), 105): 16-05-2006

SELECT CONVERT(varchar(100), GETDATE(), 106): 16 05 2006

SELECT CONVERT(varchar(100), GETDATE(), 107): 05 16, 2006

SELECT CONVERT(varchar(100), GETDATE(), 108): 10:57:49

SELECT CONVERT(varchar(100), GETDATE(), 109): 05 16 2006 10:57:49:437AM

SELECT CONVERT(varchar(100), GETDATE(), 110): 05-16-2006

SELECT CONVERT(varchar(100), GETDATE(), 111): 2006/05/16

SELECT CONVERT(varchar(100), GETDATE(), 112): 20060516

SELECT CONVERT(varchar(100), GETDATE(), 113): 16 05 2006 10:57:49:513

SELECT CONVERT(varchar(100), GETDATE(), 114): 10:57:49:547

SELECT CONVERT(varchar(100), GETDATE(), 120): 2006-05-16 10:57:49

SELECT CONVERT(varchar(100), GETDATE(), 121): 2006-05-16 10:57:49:000