开发中常用的sql语句二

create  FUNCTION dbo.ConvertWordAngle (
@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
begin
SELECT @pat=N'%[！-～]%',@step=-65248, @str=REPLACE(@str,N'　 ',N' ') ;
end
ELSE
begin
SELECT @pat=N'%[!-~]%',@step=65248, @str=REPLACE(@str,N' ',N'　 ')
end

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