Re: partial time stamp query

From: Moshe Jacobson <moshe(at)neadwerx(dot)com>
To: Kirk Wythers <kirk(dot)wythers(at)gmail(dot)com>
Cc: "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>
Subject: Re: partial time stamp query
Date: 2013-02-05 01:26:36
Message-ID: CAJ4CxLnZ7+mLjOEK7DQvioVFzZxTCLzrndm9O6DdpD0DXvFmqQ@mail.gmail.com
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On Mon, Feb 4, 2013 at 9:45 AM, Kirk Wythers <kirk(dot)wythers(at)gmail(dot)com> wrote:

> I am trying to write a query that grabs one particular day from a
> timestamp column. The data are ordered in 15 minute chunks like this:
>
> 2010-07-07 12:45:00
> 2010-07-07 13:00:00
> 2010-07-07 13:15:00
> 2010-07-07 13:30:00
> etc…
>
> WHERE derived_tsoil_fifteen_min_stacked.time2 = '2010-07-07*'
> but that grabs nothing

Just cast the timestamp to a date before you compare it:

WHERE derived_tsoil_fifteen_min_stacked.time2::date = '2010-07-07'

--
Moshe Jacobson
Nead Werx, Inc. | Manager of Systems Engineering
2323 Cumberland Parkway, Suite 201 | Atlanta, GA 30339
moshe(at)neadwerx(dot)com | www.neadwerx.com

"People don't multitask because they're good at it. They do it because they
are more distracted" -- David
Sanbonmatsu<http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0054402>

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