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:SELECTCONVERT(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) ------------------------------------------------------------------------------------------------------------语句及查询结果：SELECTCONVERT(varchar(100), GETDATE(), 0): 0516200610:57AMSELECTCONVERT(varchar(100), GETDATE(), 1): 05/16/06SELECTCONVERT(varchar(100), GETDATE(), 2): 06.05.16SELECTCONVERT(varchar(100), GETDATE(), 3): 16/05/06SELECTCONVERT(varchar(100), GETDATE(), 4): 16.05.06SELECTCONVERT(varchar(100), GETDATE(), 5): 16-05-06SELECTCONVERT(varchar(100), GETDATE(), 6): 160506SELECTCONVERT(varchar(100), GETDATE(), 7): 0516, 06SELECTCONVERT(varchar(100), GETDATE(), 8): 10:57:46SELECTCONVERT(varchar(100), GETDATE(), 9): 0516200610:57:46:827AMSELECTCONVERT(varchar(100), GETDATE(), 10): 05-16-06SELECTCONVERT(varchar(100), GETDATE(), 11): 06/05/16SELECTCONVERT(varchar(100), GETDATE(), 12): 060516SELECTCONVERT(varchar(100), GETDATE(), 13): 1605200610:57:46:937SELECTCONVERT(varchar(100), GETDATE(), 14): 10:57:46:967SELECTCONVERT(varchar(100), GETDATE(), 20): 2006-05-1610:57:47SELECTCONVERT(varchar(100), GETDATE(), 21): 2006-05-1610:57:47.157SELECTCONVERT(varchar(100), GETDATE(), 22): 05/16/0610:57:47 AMSELECTCONVERT(varchar(100), GETDATE(), 23): 2006-05-16SELECTCONVERT(varchar(100), GETDATE(), 24): 10:57:47SELECTCONVERT(varchar(100), GETDATE(), 25): 2006-05-1610:57:47.250SELECTCONVERT(varchar(100), GETDATE(), 100): 0516200610:57AMSELECTCONVERT(varchar(100), GETDATE(), 101): 05/16/2006SELECTCONVERT(varchar(100), GETDATE(), 102): 2006.05.16SELECTCONVERT(varchar(100), GETDATE(), 103): 16/05/2006SELECTCONVERT(varchar(100), GETDATE(), 104): 16.05.2006SELECTCONVERT(varchar(100), GETDATE(), 105): 16-05-2006SELECTCONVERT(varchar(100), GETDATE(), 106): 16052006SELECTCONVERT(varchar(100), GETDATE(), 107): 0516, 2006SELECTCONVERT(varchar(100), GETDATE(), 108): 10:57:49SELECTCONVERT(varchar(100), GETDATE(), 109): 0516200610:57:49:437AMSELECTCONVERT(varchar(100), GETDATE(), 110): 05-16-2006SELECTCONVERT(varchar(100), GETDATE(), 111): 2006/05/16SELECTCONVERT(varchar(100), GETDATE(), 112): 20060516SELECTCONVERT(varchar(100), GETDATE(), 113): 1605200610:57:49:513SELECTCONVERT(varchar(100), GETDATE(), 114): 10:57:49:547SELECTCONVERT(varchar(100), GETDATE(), 120): 2006-05-1610:57:49SELECTCONVERT(varchar(100), GETDATE(), 121): 2006-05-1610:57:49:000