From: Larry Rosenman <ler@lerctr.org>
To: Katka a Daniel Dunajsky <daniel_katka@hotmail.com>
To: pgsql-sql@postgresql.org
Subject: Re: Postgresql and Top N Analysis?
Date: Tue, 13 May 2003 16:36:07 -0500
Message-ID: <372780000.1052861767@lerlaptop.iadfw.net> (raw)
In-Reply-To: <Law12-F82jsKcWYSQxg00019507@hotmail.com>
References: <Law12-F82jsKcWYSQxg00019507@hotmail.com>
--On Tuesday, May 13, 2003 15:32:57 -0600 Katka a Daniel Dunajsky
<daniel_katka@hotmail.com> wrote:
> Hello all,
>
> Can anyone give me an hit how to do Top 'N' Analysis in postgresql (if it
> is possible)? I see that postgresql does not have an pseudocolumn rownum,
> therefore I can't use query like this:
>
> SELECT *
> FROM (SELECT DISTINCT session_type_id FROM user_sessions ORDER BY
> session_type_id) as dummy GROUP BY dummy;
>
> Thank you for your time.
look at the LIMIT parameter of SELECT, If I'm reading you right.
--
Larry Rosenman http://www.lerctr.org/~ler
Phone: +1 972-414-9812 E-Mail: ler@lerctr.org
US Mail: 1905 Steamboat Springs Drive, Garland, TX 75044-6749
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To: pgsql-sql@postgresql.org
Cc: ler@lerctr.org, daniel_katka@hotmail.com
Subject: Re: Postgresql and Top N Analysis?
In-Reply-To: <372780000.1052861767@lerlaptop.iadfw.net>
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