开发中常用的sql语句二

sql 数字全角半角转换

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

调用方式:   select dbo.ConvertWordAngle('Ｗ１９６９１００３',0);