To: pgsql-sql@postgresql.org
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From: Jasen Betts <jasen@xnet.co.nz>
Newsgroups: gmane.comp.db.postgresql.sql
Subject: Re: list of all months
Date: 16 Mar 2010 09:02:52 GMT
Organization: Dis (not Dat) Organisation
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On 2010-03-08, query <search2006@rediffmail.com> wrote:
> --=_484d28810a276e7b5e461f0328ee205f
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> Hi,
>
> I want to display data for all days in a month even if no data
> exists for that month. Some of the days in a month might not have any
> data at all. With normal query, we can display days only if data
> exists.But I want to display rows for all days in a month with blank
> data for non-existing day in database.
>
> How can this be achieved ?
>  

an outer join to (select FIRST_DAY_OF_MONTH + generate_series(1,DAYS_IN_MONTH) -1 )
where the date columns match

FIRST_DAY_OF_MONTH and DAYS_IN_MONTH are to be replaced (by you) with the
apropriate expressions by some means, possibly date arithmetic.