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Re: grouping by time interval

From: Larry Rosenman <ler(at)lerctr(dot)org>
To: Michael Lush <mjlush(at)ebi(dot)ac(dot)uk>
Cc: pgsql-novice(at)postgresql(dot)org
Subject: Re: grouping by time interval
Date: 2009-04-01 20:05:27
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Lists: pgsql-novice
On Wed, 1 Apr 2009, Michael Lush wrote:

> I'm writing a photo database for my family photos.  I've got a massive back 
> log so I'd like to some large scale annotation and break things up into 
> manageable chunks.
> I think one useful assumption would be tha any set of photos taken within of 
> a few seconds of each other (say 5 or less) are /probably/ about the same 
> subject...
> How would I go about detecting and marking events where the time interval 
> between two photos is less than 5 seconds

Have a look at the OVERLAPS operator.

Larry Rosenman           
Phone: +1 512-248-2683                 E-Mail: ler(at)lerctr(dot)org
US Mail: 430 Valona Loop, Round Rock, TX 78681-3893

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