From: | Michael Chaney <mdchaney(at)michaelchaney(dot)com> |
---|---|
To: | pgsql-sql(at)postgresql(dot)org, sgnerd(at)yahoo(dot)com(dot)sg |
Subject: | Re: Last day of month |
Date: | 2004-02-26 16:37:02 |
Message-ID: | 20040226163702.GC22092@michaelchaney.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-sql |
On Thu, Feb 26, 2004 at 03:07:52AM -0000, Greg Sabino Mullane wrote:
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
>
> > How to find the last sunday/mon..../sat of any given month.
>
> There is probably a smoother way to do it, but here is a
> quick little function to do what you ask. Feed it a date
> and a number, where 0 is Sunday, 1 is Monday, etc.
select date_trunc('month', current_date + '1 month'::interval) - '1 day'::interval +
(((3 - 7 - to_char(date_trunc('month', current_date + '1 month'::interval) -
'1 day'::interval,'D')::int) %7)||' days')::interval;
The "3" is the day of week (1 = Sunday, 7 = Saturday). This equation
will return the date of the last "x" of the current month. Change
"current_date" to be whatever date you wish to find the last "x" of.
Michael
--
Michael Darrin Chaney
mdchaney(at)michaelchaney(dot)com
http://www.michaelchaney.com/
From | Date | Subject | |
---|---|---|---|
Next Message | Kumar | 2004-02-27 04:51:31 | Re: Return more than a record |
Previous Message | Leo Leo | 2004-02-26 15:58:28 | a few Questions about quoted varaibles in psql |