Re: How To Exclude True Values

From: Richard Broersma Jr <rabroersma(at)yahoo(dot)com>
To: operationsengineer1(at)yahoo(dot)com, "pgsql-sql(at)postgresql(dot)org" <pgsql-sql(at)postgresql(dot)org>
Subject: Re: How To Exclude True Values
Date: 2006-06-08 01:03:21
Message-ID: 20060608010321.70607.qmail@web31812.mail.mud.yahoo.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-sql

> 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

In response to

Browse pgsql-sql by date

  From Date Subject
Next Message Richard Broersma Jr 2006-06-08 04:32:36 Re: Query to return modified results at runtime?
Previous Message George Handin 2006-06-08 00:29:23 Query to return modified results at runtime?