Re: using generate_series to iterate through months

Ok, it is Monday -:)  Thanks Tom!


-----Original Message-----
From: Tom Lane [mailto:tgl@sss.pgh.pa.us]
Sent: Monday, August 03, 2009 11:44 AM
To: Bill Reynolds
Cc: pgsql-general@postgresql.org
Subject: Re: [GENERAL] using generate_series to iterate through months

"Bill Reynolds" <Bill.Reynolds@ateb.com> writes:
> Ok, I'm a bit stumped on getting my group by query to work which
> iterates through a number of months that basically a generate_series
> provides for me.
> ...
> select DATE('2008-05-01') + interval (s.a??? ' months') as Month_of

No, you're confusing a syntax that's meant to handle literal constants
with something that's appropriate for computation.  What you want is

> select DATE('2008-05-01') + s.a * interval '1 month' as Month_of

that is, multiply the sequence output by a suitable interval constant.

            regards, tom lane