Or
select date_part('day', date_trunc('month', '01/10/04') + '1 month'::interval - '1 day'::interval) as days;
or
select date_part('day', to_date('mon', 'Jan') + '1 month'::interval - '1 day'::interval) as days;
Arthur Hoogervorst wrote:
Hi,
Something like this?
SELECT date_part('day', (date_part('year', '01/10/04' :: date) || '-' ||
date_part('month', '01/10/04' :: date) || '-01') ::date + '1 month'::interval
- '1 day'::interval) AS days;
Regards,
Arthur
On Wed, 30 Mar 2005 16:45:43 -0700, Mark Fox <[EMAIL PROTECTED]> wrote:
Greetings,
Thanks Dan, but I searched for, and scoured, that page before asking my question. It helped with some of the details, but not on the general approach. I'll try to restate my problem in a better way:
What I want is SELECT statement that references no tables but returns the days in a given month. I'm now thinking that I might be able to come up with something using an IN clause and using EXTRACT, but haven't figured it out yet.
Mark
On Wed, 30 Mar 2005 15:16:19 -0800, Dann Corbit <[EMAIL PROTECTED]> wrote:
The online documentation has a search function. It would lead you to this: http://www.postgresql.org/docs/8.0/static/functions-datetime.html
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Fox Sent: Wednesday, March 30, 2005 3:07 PM To: pgsql-general@postgresql.org Subject: [GENERAL] Days in month query
Greetings,
This is more of an SQL question, but since each database server seems to use it's own syntax for handling dates...
Is there a way to query for the days in a month? For example, querying for the days in January of this year? Listing the days between two dates would be useful as well.
I'm sure I saw a query like this somewhere, but I can't track it down. Just to be clear, there were no tables involved. Just a SELECT statement that returned all the days in a given month.
Basically, I have a table of "events" and I'd like to generate a histogram of how many events occur on the days of a particular month. What I do now is create a temporary table, fill it with the appropriate days, and then do a cross join and summation to generate what I need. This works, but seems messy to me.
Mark
---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ?
http://www.postgresql.org/docs/faq
---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])
---------------------------(end of broadcast)---------------------------
TIP 4: Don't 'kill -9' the postmaster
---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])
