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using calculated column in where-clause

From: Patrick Scharrenberg <pittipatti(at)web(dot)de>
To: pgsql-sql(at)postgresql(dot)org
Subject: using calculated column in where-clause
Date: 2008-06-17 20:46:08
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-sql

I'd like to do some calculation with values from the table, show them a
new column and use the values in a where-clause.

Something like this
select a, b , a*b as c from ta where c=2;

But postgresql complains, that column "c" does not exist.

Do I have to repeat the calculation (which might be even more complex
:-) ) in the "where"-clause, or is there a better way?

Thanks in advance.

Best regards


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Next:From: Andreas KretschmerDate: 2008-06-17 21:10:41
Subject: Re: using calculated column in where-clause
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