SqlServer数据库全角转半角

SqlServer数据库全角转半角

CREATE   FUNCTION   f_Convert( 
@str   NVARCHAR(4000),   --要转换的字符串 
@flag   bit                             --转换标志,0转换成半角,1转换成全角 
)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
调用：
update table1 set column1=dbo.f_Convert(column1,0);

 转处：http://blog.163.com/jiaqifeng_2008/blog/static/90518210201132811153445/