I'm affraid
you can't.
AFAIK,
WHERE clause is processed before the SELECT output expressions
Best,
Oliveiros
----- Original Message -----
From: "Marcel Ruff" <m...@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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