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fnStripChars

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Submitted on: 8/26/2002 1:44:57 PM
By: Shane Lively 
Level: Beginner
User Rating: Unrated
Compatibility:SQL Server 2000

Users have accessed this code 1427 times.
 
(About the author)
 
     Strips unwanted characters from an alphanumeric value. Useful for data cleanup.
 
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By using this code, you agree to the following terms...   
1) You may use this code in your own programs (and may compile it into a program and distribute it in compiled format for languages that allow it) freely and with no charge.   
2) You MAY NOT redistribute this code (for example to a web site) without written permission from the original author. Failure to do so is a violation of copyright laws.   
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4) You will abide by any additional copyright restrictions which the author may have placed in the code or code's description.

--**************************************
--     
-- Name: fnStripChars
-- Description:Strips unwanted character
--     s from an alphanumeric value. Useful for
--      data cleanup.
-- By: Shane Lively
--
-- Inputs:@val varchar(1024) Value to be
--      stripped
@char_list varchar(255)List OF characters TO strip FROM value
--
-- Returns:Value stripped of all charact
--     ers passed in character list.
--
-- Assumes:USAGE: 
SELECT dbo.fnStripChars('123#$4%567&8dj*beys''^,a?:;','!@#$%^&*()":?><~`;,./][}{''|\')
RETURNS - '12345678djbeysa'
--
--This code is copyrighted and has-- limited warranties.Please see http://
--     www.Planet-Source-Code.com/vb/scripts/Sh
--     owCode.asp?txtCodeId=531&lngWId;=5--for details.--**************************************
--     

IF EXISTS(SELECT * FROM sysobjects WHERE name = 'fnStripChars') DROP FUNCTION fnStripChars
GO
CREATE FUNCTION [dbo].[fnStripChars] (
@val varchar(1024), --Value TO be stripped
@char_list varchar(255) --List OF characters TO strip FROM value
) 
/****************************************************************************************************
	This function strips a list OF characters FROM the value passed in.
*****************************************************************************************************/
RETURNS varchar(1024) AS 
    BEGIN 
    DECLARE @len int,
    	@char char(1)
    DECLARE @ASCII table(ASC_code int)
    SET @len = LEN(@char_list)
    WHILE (@len > 0)
        BEGIN
        	SET @char = SUBSTRING(@char_list,@len,1)
        	SET @len = @len - 1
        	INSERT INTO @ASCII SELECT ASCII(@char)
    END

SET @len = LEN(@val) WHILE (@len > 0) BEGIN SET @char = SUBSTRING(@val,@len,1) SET @len = @len - 1 SELECT TOP 1 @val = REPLACE(@val,@char,'') FROM @ASCII WHERE ASCII(@char) IN(SELECT * FROM @ASCII) END
RETURN @val END


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