CONVERT的使用方法:
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 or 100 | mon dd yyyy hh:miAM(或PM)
---------------------------------------------------------------
1 | 101 | mm/dd/yy
----------------------------------------------------------------
-----------------------------
2 | 102 | yy-mm-dd
------------------------------------------------------------------
3 | 103 | dd/mm/yy
-------------
-------------------------------------------------------------------
4 | 104 | dd-mm-yy
-------------------------------------------------------------------
5 | 105 | dd-mm-yy
-------------------------------------------------------------------
6 | 106 | dd mon yy
-------------------------------------------------------------------
7 | 107 | mon dd,yy
----------------------------------------------------------------------
8 | 108 | hh:mm:ss
----------------------------------------------------------------------
- | 9 or 109 | mon dd yyyy hh:mi:ss:mmmmAM(或PM)
----------------------------------------------------------------------
10 | 110 | mm-dd-yy
-----------------------------------------------------------------------
11 | 111 | yy/mm/dd
----------------------------------------------------------------------
12 | 112 | yymmdd
-----------------------------------------------------------------------
- | 13 or 113 | dd mon yyyy hh:mi:ss:mmm(24小时制)
-----------------------------------------------------------------------
14 | 114 | hh:mi:ss:mmm(24小时制)
------------------------------------------------------------------------
- | 20 or 120 | yyyy-mm-dd hh:mi:ss(24小时制)
-------------------------------------------------------------------------
- | 21 or 121 | yyyy-mm-dd hh:mi:ss:mmm(24小时制)