From: A. Kretschmer <andreas.kretschmer@schollglas.com>
To: pgsql-sql@postgresql.org
Subject: Re: Between and miliseconds (timestamps)
Date: Fri, 10 Nov 2006 16:24:28 +0100
Message-ID: <20061110152427.GA3634@a-kretschmer.de> (raw)
In-Reply-To: <55c095e90611100650q3ec0ec27tc0f8e94a0eb032eb@mail.gmail.com>
References: <55c095e90611100628m1322eea5jeeca3a94d90e1eb1@mail.gmail.com>
<20061110144458.GA2909@a-kretschmer.de>
<55c095e90611100650q3ec0ec27tc0f8e94a0eb032eb@mail.gmail.com>
am Fri, dem 10.11.2006, um 12:50:38 -0200 mailte Ezequias Rodrigues da Rocha folgendes:
> > select * from base.table
> > where when
> > between
> > '2006-09-06 00:00: 00.000000'
> > and
> > '2006-09-06 23:59:59.999999'
> > order by 2
> >
> > Is there a simplest way or not ?
>
> Yes. ... where when = '2006-09-06'::date.
>
>
> I didn't understand you. Wha you mean '::date' ?
This is a so called CAST. For example:
test=# select now();
now
-------------------------------
2006-11-10 16:19:49.543082+01
(1 row)
test=# select now()::date;
now
------------
2006-11-10
(1 row)
Read more about this:
16:23 < akretschmer> ??cast
16:23 < rtfm_please> For information about cast
16:23 < rtfm_please> see http://www.postgresql.org/docs/current/static/sql-createcast.html
16:23 < rtfm_please> or http://www.postgresql.org/docs/current/static/sql-expressions.html#SQL-SYNTAX-TYPE-CASTS>
> And if I have a period of time bigger than 1 day ?
BETWEEN includes the boundaries, if you have full days so say something
like 'between first_day and last_day'.
Do you need time-boundaries? Rewrite your query to something like
'where time_column > time_1 and time_column < time_2'
Andreas
--
Andreas Kretschmer
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To: pgsql-sql@postgresql.org
Cc: andreas.kretschmer@schollglas.com
Subject: Re: Between and miliseconds (timestamps)
In-Reply-To: <20061110152427.GA3634@a-kretschmer.de>
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