From: | Raymond O'Donnell <rod(at)iol(dot)ie> |
---|---|
To: | Alex Thurlow <alex-reports(at)blastro(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Grouping logs by ip and time |
Date: | 2011-11-08 18:48:52 |
Message-ID: | 4EB97994.7070203@iol.ie |
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Thread: | |
Lists: | pgsql-general |
On 08/11/2011 17:59, Alex Thurlow wrote:
> Hello all,
> I have a table which stores action logs from users. It looks
> something like this:
> log_type text,
> date date,
> "time" time without time zone,
> ip inet
[snip]
> What I'd like to do is be able to group these logs by sessions based on
> the IP and the time range so I can figure out the time taken between
> each action.
Would something like this work? -
select ip, max("time") - min("time") as session_duration
from log_table
group by ip;
This doesn't take the date into account - what happens if the session
spans midnight? You can get around this by using a timestamp column
instead of separate date and time.
Ray.
--
Raymond O'Donnell :: Galway :: Ireland
rod(at)iol(dot)ie
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