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)
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1 | 101 美国 | mm/dd/yy
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2 | 102 ansi | yy-mm-dd
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3 | 103 英法 | dd/mm/yy
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4 | 104 德国 | dd.mm.yy
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5 | 105 意大利 | dd-mm-yy
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6 | 106 | dd mon yy
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7 | 107 | mon dd,yy
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8 | 108 | hh:mm:ss
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9 | 109 | mon dd yyyy hh:mi:ss:mmmmam(或pm)
------------------------------------------------------------------------------------------------------------
10 | 110 美国 | mm-dd-yy
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11 | 111 日本 | yy/mm/dd
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12 | 112 iso | yymmdd
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13 | 113 欧洲默认值 | dd mon yyyy hh:mi:ss:mmm(24小时制)
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14 | 114 | hh:mi:ss:mmm(24小时制)
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20 | 120 odbc 规范 | yyyy-mm-dd hh:mi:ss(24小时制)
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21 | 121 | yyyy-mm-dd hh:mi:ss:mmm(24小时制)
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语句及查询结果：
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