From: Richard Broersma Jr <rabroersma@yahoo.com>
To: operationsengineer1@yahoo.com, "pgsql-sql@postgresql.org" <pgsql-sql@postgresql.org>
Subject: Re: How To Exclude True Values
Date: Wed, 7 Jun 2006 18:03:21 -0700 (PDT)
Message-ID: <20060608010321.70607.qmail@web31812.mail.mud.yahoo.com> (raw)
In-Reply-To: <20060607232928.51859.qmail@web33310.mail.mud.yahoo.com>
> i think i've figured out the gist of the thought
> process behind the SQL query...
>
> 1. select everything from t_inspect_result as table a
> 2. select max timestamp value entries in
> t_inspect_result as table b
> 3. choose only choose those rows where the max
> timestamps of table a and b are equal.
>
> is that about it?
The one problem with query would be if there is a possibility that two differnt tests will have
the exact same time stamp.
If that is a possibility, then you could use the exact same query structure but replace
Max(timestamp) with max(inspect_result_id) and then join on inspect_result_id instead.
Regards,
Richard Broersma
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To: pgsql-sql@postgresql.org
Cc: rabroersma@yahoo.com
Subject: Re: How To Exclude True Values
In-Reply-To: <20060608010321.70607.qmail@web31812.mail.mud.yahoo.com>
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