Date: Sat, 4 Jun 2011 16:49:55 -0400
From: lists-pgsql@useunix.net
To: Richard Broersma <richard.broersma@gmail.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: selecting records X minutes apart
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Did you mean WHERE in place of your first AND?  If so I already had something
like this but it only returns one set, the oldest group of entries for each
ID.


On Sat, Jun 04, 2011 at 01:09:39PM -0700, Richard Broersma wrote:
> On Sat, Jun 4, 2011 at 12:15 PM,  <lists-pgsql@useunix.net> wrote:
> > 狢 want to
> > select records grouped by ID, ordered by timestamp, in ascending order so I'm
> > starting with the oldest, that are at least X minutes apart.
> 
> 
> Here my guess:
> 
> SELECT id, ts
>   FROM Yourtable AS A
>    AND NOT EXISTS ( SELECT *
>                       FROM Yourtable AS B
>                      WHERE B.id = A.id
>                        AND B.ts > A.ts - INTERVAL '5 MINUTES'
>                        AND B.tx < A.ts )
> 
> ORDER BY id, ts;
> 
> -- 
> Regards,
> Richard Broersma Jr.