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Re: current_date / datetime stuff

From: Jon Sime <jsime(at)mediamatters(dot)org>
To: pgsql-novice(at)postgresql(dot)org
Cc: Joshua <joshua(at)joshuaneil(dot)com>
Subject: Re: current_date / datetime stuff
Date: 2007-06-04 16:09:04
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-novice
Joshua wrote:
> Hello,
> I was hoping someone here may be able to help me out with this one:
> Is there anything similiar to:     SELECT current_date;
> that will return the date of the first Monday of the month?

You might try the following query, or a variation thereof (replacing the 
"now()"s in the subquery with an arbitrary date if you need the first 
monday of months other than the current one):

select cast(case
     when d.dow > 1 then d.m + (8 - d.dow) * interval '1 day'
     when d.dow < 1 then d.m + 1 * interval '1 day'
     else d.m end as date) as first_monday
from (select extract(dow from date_trunc('month', now())) as dow,
     date_trunc('month', now()) as m) d;


Senior Systems Developer
Media Matters for America

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