Howdy , Michele,
Give this a try
SELECT id_user
FROM t_your_table
WHERE datetime
BETWEEN A -- plug here beginning of interval
AND B -- and end here
GROUP BY id_user
HAVING COUNT(*) = -SUM(value)
Then tell me if it gives you what you want
Best,
Oliveiros Cristina
----- Original Message -----
From: "Michele Petrazzo - Unipex" <michele.petrazzo@unipex.it>
To: <pgsql-sql@postgresql.org>
Sent: Friday, September 17, 2010 3:50 PM
Subject: [SQL] all the table values equal
> Hi list,
> this is a Friday afternoon question... :)
> I have a table like this:
>
> id_user | value | datetime
> 1 | 1 | xxx
> 1 | 2 | xxx+1
> 1 | -1 | xxx+2
> 2 | -1 | xxx
> 2 | -1 | xxx+1
> 3 | 4 | xxx
> 3 | 10 | xxx+1
>
> I'm trying to create a query that say me which id_user, inside a
> interval of time, has all the values -1
>
> The part if the interval it's not a problem, but I'm fighting with the
> aggregate...
> Someone?
>
> Thanks,
> Michele
>
> --
> Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-sql
