CREATE FUNCTION f_Convert(
@str NVARCHAR(4000), --要轉換的字符串
@flag bit --轉換標志,0轉換成半角,1轉換成全角
)RETURNS nvarchar(4000)
AS
BEGIN
DECLARE @pat nvarchar(8),@step int,@i int,@spc int
IF @flag=0
SELECT @pat=N'%[！-～]%',@step=-65248,
@str=REPLACE(@str,N' ',N' ')
ELSE
SELECT @pat=N'%[!-~]%',@step=65248,
@str=REPLACE(@str,N' ',N' ')
SET @i=PATINDEX(@pat COLLATE LATIN1_GENERAL_BIN,@str)
WHILE @i>0
SELECT @str=REPLACE(@str,
SUBSTRING(@str,@i,1),
NCHAR(UNICODE(SUBSTRING(@str,@i,1))+@step))
,@i=PATINDEX(@pat COLLATE LATIN1_GENERAL_BIN,@str)
RETURN(@str)
END
GO
---------------------------------
DECLARE @t TABLE(col nvarchar(10))
INSERT @t SELECT 'aa'
UNION ALL SELECT 'Aa'
UNION ALL SELECT 'ＡＡ'
UNION ALL SELECT 'Ａ,Ａ'
UNION ALL SELECT 'Ａ，Ａ'
select * from @t
select dbo.f_Convert(col,0) from @t
--測試效果
http://topic.csdn.net/t/20060317/14/4621265.html
posted on 2012-05-31 14:08
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sql server