From: Gary Stainburn <gary.stainburn@ringways.co.uk>
To: pgsql-sql <pgsql-sql@postgresql.org>
Subject: alias problem on join
Date: Fri, 6 Feb 2004 11:38:48 +0000
Message-ID: <200402061138.48823.gary.stainburn@ringways.co.uk> (raw)
Hi folks,
I've got an accounts table and a transactions table and want to do a summary
join. If I do:
bank=# select aid, aname, aodraft from accounts a
bank-# left outer join (select account, sum(amount) as balance
bank(# from statement group by account) as s
bank-# on s.account = a.aid;
I get the results I want, but I need to rename the aid column to 'key' so that
I can feed it into a standard routine I have in PHP to build a hash. If I
do:
bank=# select aid as key, aname, aodraft from accounts a
bank-# left outer join (select account, sum(amount) as balance
bank(# from statement group by account) as s
bank-# on s.account = a.key;
I get
ERROR: No such attribute or function 'key'
Any ideas why?
Also, I'm sure I can do this more efficiently as a single select/join, but
can't seem to work out why (Friday morning syndrome). Anyone give me a clue?
--
Gary Stainburn
This email does not contain private or confidential material as it
may be snooped on by interested government parties for unknown
and undisclosed purposes - Regulation of Investigatory Powers Act, 2000
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: gary.stainburn@ringways.co.uk
Subject: Re: alias problem on join
In-Reply-To: <200402061138.48823.gary.stainburn@ringways.co.uk>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox