Re: subtract a day from the NOW function

From: Scott Marlowe <smarlowe(at)g2switchworks(dot)com>
To: "Campbell, Lance" <lance(at)uiuc(dot)edu>
Cc: Michael Glaesemann <grzm(at)seespotcode(dot)net>, pgsql-sql(at)postgresql(dot)org
Subject: Re: subtract a day from the NOW function
Date: 2007-06-07 18:12:00
Message-ID: 46684A70.4080903@g2switchworks.com
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Campbell, Lance wrote:
> Michael,
> So based on your feedback would it be better to do option A or B below?
>
> 1) I have a timestamp field, "some_timestamp", in table "some_table".
> 2) I want to compare field "some_timestamp" to the current date - 1 day.
> I need to ignore hours, minutes and seconds.
>
You might want to use date_trunc then:

select * from sometable where date_trunc('day',tiemstampfield) >
date_trunc('day',now() - interval '1 day');

or something like that.

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