SQL Server中Convert转化函数的使用

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:

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Style(2位表示年份)    |   Style(4位表示年份)    |    输入输出格式                                    

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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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