Re: DISTINCT ON troubles - Mailing list pgsql-sql

From Jeremy Smith
Subject Re: DISTINCT ON troubles
Date
Msg-id FKEOIJEHOIKIOEHCGNCLIENGEDAA.jer@highboard.com
Whole thread Raw
In response to Re: DISTINCT ON troubles  (Josh Berkus <josh@agliodbs.com>)
Responses Re: DISTINCT ON troubles
Re: Date / interval question
List pgsql-sql
Thanks Josh,

I'll do that, I just wasn't sure if I was missing something obvious.

Jeremy

-----Original Message-----
From: Josh Berkus [mailto:josh@agliodbs.com]
Sent: Thursday, February 19, 2004 2:29 PM
To: jer@highboard.com; pgsql-sql@postgresql.org
Subject: Re: [SQL] DISTINCT ON troubles


Jeremy,

> Am I just approaching this all wrong and need to create a temporary table
> and draw from that, or is there a way to salvage this query?

Think about using a subquery instead of the DISTINCT ON approach.   I don't
think you can get what you want with DISTINCT ON.

A temporary table is not necessary.


--
-Josh BerkusAglio Database SolutionsSan Francisco





pgsql-sql by date:

Previous
From: Josh Berkus
Date:
Subject: Re: DISTINCT ON troubles
Next
From: Tom Lane
Date:
Subject: Re: CHAR(n) always trims trailing spaces in 7.4