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merge timestamps to intervals

From: Patrick Scharrenberg <pittipatti(at)web(dot)de>
To: pgsql-sql(at)postgresql(dot)org
Subject: merge timestamps to intervals
Date: 2008-05-12 05:38:47
Message-ID: 4827D7E7.6000702@web.de (view raw or flat)
Thread:
Lists: pgsql-sql
Hi!

I have a table where I repeatingly log the status of some service, which
looks something like this:

	< timestamp, status >

Now, everytime my service is up I save the timestamp and a status of
"up", if it's down I save the timestamp with "down", eg:
	10:13	up
	10:14	up
	10:15	up
	10:16	down
	10:17	up
	10:18	up

I'd like to merge this information to intervals where the service was up
or down.

	< intervall, status >
	10:13-10:15	up
	10:16-10:16	down
	10:17-1018	up

I've no clue how to approach this problem.

Any ideas/hints?
Also suggestions on a feasible better schema are welcome. :-)

Thanks
Patrick

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Next:From: Craig RingerDate: 2008-05-12 06:33:03
Subject: Re: merge timestamps to intervals
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Subject: Re: Difference in columns

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