From: Martijn Tonies
Date: December 4 2003 5:22pm
Subject: Re: WHERE with CASE colums?
List-Archive: http://lists.mysql.com/mysql/155066
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Hi Scott,


===
When searching and listing them I want to remove any preceeding 'The ', 'An
', or 'A ' that occurs in the title and I also want to be able to search it.
The case statement as follows seems to work fine:

SELECT
CASE
WHEN title LIKE  'The %' THEN RIGHT( title, length( title )  -4  )
WHEN title LIKE  'A %' THEN RIGHT( title, length( title )  -2  )
WHEN title LIKE  'An %' THEN RIGHT( title, length( title )  -3  )
ELSE title
END  AS modtitle
FROM Journal_Info

But if I try a WHERE clause using the columns AS title I get an error.

Can anyone help me figure out how to search the CASEed column?
==

Are you trying:
WHERE modtitle = '... something ... '
?

Cause the WHERE clause only works on columns. If you want to
do a match on the result of the CASE, you have to do your case
thingy again:

WHERE ( case ...yourstuff... end ) = 'something'

With regards,

Martijn Tonies
Database Workbench - developer tool for InterBase, Firebird, MySQL & MS SQL
Server.
Upscene Productions
http://www.upscene.com