Re: How change col name during query to use it in where clause - Mailing list pgsql-sql

I'm affraid
you can't.


AFAIK,
WHERE clause is processed before the SELECT output expressions

Best,
Oliveiros
----- Original Message ----- 
From: "Marcel Ruff" <mr@marcelruff.info>
To: <pgsql-sql@postgresql.org>
Sent: Friday, May 04, 2012 11:25 AM
Subject: [SQL] How change col name during query to use it in where clause


> Hi,
>
> is an alias name not usable in the where clause?
>
> select EXTRACT(day from enddate::TIMESTAMP - old_enddate::TIMESTAMP) AS 
> TAGE  from account_h  where TAGE>5;
> ERROR:  column "tage" does not exist
> LINE 1: ... TAGE>5 ...
>
> Thank you
> Marcel
>
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