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From: Mike Rylander <miker@purplefrog.com>
X-Newsgroups: comp.databases.postgresql.sql
Subject: Re: How to filter on timestamps?
Date: Tue, 06 Jul 2004 23:28:30 -0400
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To: "B.W.H. van Beest" <bwvb@xs4all.nl>
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<posted & mailed>

B.W.H. van Beest wrote:

> 
> 
> I have a table where one of the columns is of type 'TIMESTAMP'
> 
> How can I do a query to filter on the TIMESTAMP value, e.g. to obtain
> all rows earlier than a certain time stamp?

Think of the math opperators '<' and '>' as 'before' and 'after',
respectively.  ie:

SELECT * FROM table WHERE begin_date > '2004-07-06';

You can also use BETWEEN:

SELECT * FROM table WHERE update_timestamp BETWEEN '2004-07-01' AND
'2004-07-06';

Remember that when timestamps are cast to dates, they are cast with
00:00:00.0 as the time part.

See the docs on this at
http://www.postgresql.org/docs/7.4/interactive/datatype-datetime.html and
http://www.postgresql.org/docs/7.4/interactive/functions-datetime.html .

--miker
> 
> Regards,