Re: How change col name during query to use it in where clause

I'm affraid
you can't.

AFAIK,
WHERE clause is processed before the SELECT output expressions

Best,
Oliveiros
----- Original Message -----
From: "Marcel Ruff" <mr(at)marcelruff(dot)info>
To: <pgsql-sql(at)postgresql(dot)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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