From: Raj Mathur (राज माथुर) <raju@linux-delhi.org>
To: pgsql-sql@postgresql.org
Subject: Re: Flatten table using timestamp and source
Date: Thu, 24 May 2012 17:29:20 +0530
Message-ID: <201205241729.21270.raju@linux-delhi.org> (raw)
In-Reply-To: <73a6b75b83b37093e5e2751fc59c4323@mail.gmail.com>
References: <73a6b75b83b37093e5e2751fc59c4323@mail.gmail.com>
On Thursday 24 May 2012, Elrich Marx wrote:
> I am quite new to Postgres, so please bear with me.
>
> I have a table with data in the following format:
>
> Table name : Time_Source_Table
>
> Source , Stime
> 1, "2012-05-24 13:00:00"
> 1, "2012-05-24 13:01:00"
> 1, "2012-05-24 13:02:00"
> 2, "2012-05-24 13:03:00"
> 2, "2012-05-24 13:04:00"
> 1, "2012-05-24 13:05:00"
> 1, "2012-05-24 13:06:00"
>
> I’m trying to get to a result that flattens the results based on
> source, to look like this:
>
> Source, Stime, Etime
> 1, "2012-05-24 13:00:00","2012-05-24 13:02:00"
> 2, "2012-05-24 13:03:00","2012-05-24 13:04:00"
> 1, "2012-05-24 13:05:00","2012-05-24 13:06:00"
>
> Where Etime is the last Stime for the same source.
How do you figure out that the Etime for (1, 13:00:00) is (1, 13:02:00)
and not (1, 13:01:00)?
Regards,
-- Raj
--
Raj Mathur || raju@kandalaya.org || GPG:
http://otheronepercent.blogspot.com || http://kandalaya.org || CC68
It is the mind that moves || http://schizoid.in || D17F
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To: pgsql-sql@postgresql.org
Cc: raju@linux-delhi.org
Subject: Re: Flatten table using timestamp and source
In-Reply-To: <201205241729.21270.raju@linux-delhi.org>
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