From: Andreas <maps.on@gmx.net>
To: pgsql-sql@postgresql.org
Subject: need help with some aggregation magic
Date: Thu, 09 Jun 2011 15:43:24 +0200
Message-ID: <4DF0CDFC.4070802@gmx.net> (raw)
hi,
I have a log-table that stores events of users and projects like this
( user_id integer, project_id integer, ts timestamp, event_type integer )
I need an aggregated list of worktime per user, per project, per day.
The users can switch projects during the day so I can't work this out
with min(ts) and max(ts).
Is there a clever way to get this with SQL ?
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: maps.on@gmx.net
Subject: Re: need help with some aggregation magic
In-Reply-To: <4DF0CDFC.4070802@gmx.net>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox