From: Andrew Sullivan <ajs@crankycanuck.ca>
To: pgsql-sql@postgresql.org
Subject: Re: Using Query Result in WHERE Clause
Date: Mon, 5 Jun 2006 07:10:07 -0400
Message-ID: <20060605111007.GA4832@phlogiston.dyndns.org> (raw)
In-Reply-To: <20060602200640.91950.qmail@web33304.mail.mud.yahoo.com>
References: <20060602200640.91950.qmail@web33304.mail.mud.yahoo.com>
On Fri, Jun 02, 2006 at 01:06:40PM -0700, operationsengineer1@yahoo.com wrote:
> hi all,
>
> SUMMARY:
>
> i want to replace
>
> AND t_inspect.inspect_pass = 'f'
>
> with a complex query that yields the same result. the
> complex query is in the form of...
[snip]
But your complex query isn't in the form where anything will come out
"= 'f'". You have too many columns in the SELECT.
What you prabably need to do is rewrite it as a subquery in the FROM
clause, alias it as (say) alias_t_inspect, and then use your
condition to get you what you want. I won't warrant what the
performance will be, however.
A
--
Andrew Sullivan | ajs@crankycanuck.ca
If they don't do anything, we don't need their acronym.
--Josh Hamilton, on the US FEMA
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To: pgsql-sql@postgresql.org
Cc: ajs@crankycanuck.ca
Subject: Re: Using Query Result in WHERE Clause
In-Reply-To: <20060605111007.GA4832@phlogiston.dyndns.org>
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