Re: time interval question

From: Jason Earl <jdearl(at)yahoo(dot)com>
To: Justin Clift <justin(at)postgresql(dot)org>, Cefull Lo <cefull_lo(at)yahoo(dot)com>, PostgreSQL General Mailing List <pgsql-general(at)postgresql(dot)org>
Subject: Re: time interval question
Date: 2001-08-21 18:52:24
Message-ID: 20010821185224.47550.qmail@web10001.mail.yahoo.com
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On my box:

processdata=# select version();
version

---------------------------------------------------------------
PostgreSQL 7.1.3 on i686-pc-linux-gnu, compiled by
GCC 2.95.4
(1 row)

You can do something like this:

SELECT dt, dt::time FROM prod_journal WHERE dt::time
BETWEEN '00:00:00' AND '08:30:00';

dt in this case is a timestamp field, and the results
are what you would expect.

Take care,
Jason

--- Justin Clift <justin(at)postgresql(dot)org> wrote:
> Hi,
>
> You could do something along the lines of :
>
> SELECT foo, bar FROM baz WHERE date_part('hour',
> foo) > 0 AND
> date_part('hour', foo) < 8;
>
> Simple, but effective. Only works for whole hours
> like in your example
> though.
>
> :-)
>
> Regards and best wishes,
>
> Justin Clift
>
>
> Cefull Lo wrote:
> >
> > given a timestamp data, e.g. 2001-08-18
> 06:01:23+08
> > How can I check that is it lie between 00:00:00
> and 08:00:00 and ignore the
> > date?
> >
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