sqlserver之convert用法

sqlserver之convert 函数应用

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 10:57:49.700
select convert(varchar(100), getdate(), 126): 2006-05-16t10:57:49.827
select convert(varchar(100), getdate(), 130): 18 ???? ?????? 1427 10:57:49:907am
select convert(varchar(100), getdate(), 131): 18/04/1427 10:57:49:920am

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)

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