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To remove the specified Characters in the Given String


To remove the specified Characters in the Given String

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Ramji Sridharan
Ramji Sridharan
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Comments posted to this topic are about the item To remove the specified Characters in the Given String
Kricky
Kricky
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Did I miss something here? It looks like the Function is called "dbo.GEN_FN_StripCharacters", but the selects referenced in the comments are "dbo.fn_StripCharacters".
Ed.Wallander
Ed.Wallander
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Just looks like Ram called the function by an earlier name.

I made a slight modification, converting the string types that will be stripped out to a parameter rather than inputting the expression. I also added more characters to the test string just to be sure it was capturing a few more non-alphanumeric characters for my own peace of mind.


CREATE FUNCTION dbo.GEN_FN_StripCharacters
(
@strMatchType NVARCHAR(3),
@strInputString NVARCHAR(MAX)
)

/*
---Created By : Ram
--Date : 15-Feb-2013
--- Purpose : To remove the specified Characters in the Given String
Alphabetic only: SELECT dbo.fn_StripCharacters('a1!s2@d3#f4$', '^a-z')
Numeric only: SELECT dbo.fn_StripCharacters('a1!s2@d3#f4$', '^0-9+-/')
Alphanumeric only: SELECT dbo.fn_StripCharacters('a1!s2@d3#f4$', '^a-z0-9')
Non-alphanumeric: SELECT dbo.fn_StripCharacters('a1!s2@d3#f4$', 'a-z0-9')

--Modified by : Ed
--Date : 01-Jul-2013
Converted match strings into a match type parameter
A-Alpha
N-Numeric
AN-AlphaNumeric

Precede with ^ to denote NOT

'^AN' = Not AlphaNumeric

*/


RETURNS NVARCHAR(MAX)
AS
BEGIN

DECLARE @strMatchExpression varchar(15)

SET @strMatchExpression = '%[' + CASE @strMatchType
WHEN 'A' THEN 'a-z'
WHEN '^A' THEN '^a-z'
WHEN 'N' THEN '0-9+-/'
WHEN '^N' THEN '^0-9+-/'
WHEN 'AN' THEN 'a-z0-9'
WHEN '^AN' THEN '^a-z0-9'
END + ']%';

WHILE
PATINDEX( @strMatchExpression , @strInputString ) > 0
SET @strInputString = STUFF( @strInputString , PATINDEX( @strMatchExpression , @strInputString ) , 1 , '' );

RETURN @strInputString;
END;

SELECT dbo.GEN_FN_StripCharacters('a','a"1!S2@{]d3#f4$`~''')
SELECT dbo.GEN_FN_StripCharacters('^a','a"1!S2@{]d3#f4$`~''')
SELECT dbo.GEN_FN_StripCharacters('n','a"1!S2@{]d3#f4$`~''')
SELECT dbo.GEN_FN_StripCharacters('^n','a"1!S2@{]d3#f4$`~''')
SELECT dbo.GEN_FN_StripCharacters('an','a"1!S2@{]d3#f4$`~''')
SELECT dbo.GEN_FN_StripCharacters('^an','a"1!S2@{]d3#f4$`~''')



tskelley
tskelley
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Great function! Definitely going into my Hall of Fame!

One other trick it handled nicely was including a decimal in the numeric sort order. For example, I needed 1.11.338 to show before 10.1.002 By adding a decimal at the end of the numeric check, I was able to sort the numbers with multiple decimals correctly.

ufn_StripCharacters([ColumnName], '^0-9+-/.')


Awesome!!!!!!!



Iwas Bornready
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Thanks for the script.
Go


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