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

View Code

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