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Checking for alpha characters in a field

Posted on 2008-10-01
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Last Modified: 2010-04-21
Hello All

Is it possible to select items in a SQL field that can only contain letters and nothing else, no numbers, special characters etc.

Many thanks
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Question by:bostonste
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BrandonGalderisi earned 250 total points
ID: 22617237
Yup...

This simple example shows how to use patindex to do it.


select 1
where patindex('%[^A-Z]%','aABaC')=0


select 1
where patindex('%[^A-Z]%','aAB1C')=0
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by:BrandonGalderisi
ID: 22617243
just repalce 'aAB1C' or 'aABaC' with your column name.
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by:Scott Pletcher
Scott Pletcher earned 250 total points
ID: 22617590

SELECT column, ...
FROM ...
WHERE column NOT LIKE '%[^a-z]%'
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Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

 
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by:Scott Pletcher
ID: 22617626
Yes, I know that's annoying because of the NOT of a not (^), but really, there's no other easy way to do it :-) , at least AFAIK .
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by:BrandonGalderisi
ID: 22617634
That does the same thing.
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Expert Comment

by:Scott Pletcher
ID: 22617809
Except that SQL would consider an index scan on that column for my code, since the column is not imbedded within a function call :-) .
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Author Closing Comment

by:bostonste
ID: 31502089
EXCELLENT CHAPS
MANY THANKS
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Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

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