Re: Days in month query

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От Mark Fox
Тема Re: Days in month query
Дата
Msg-id bca49a9f05033112227dacbd86@mail.gmail.com
обсуждение исходный текст
Ответ на Re: Days in month query  ("Dann Corbit" <DCorbit@connx.com>)
Список pgsql-general
Greetings,

Thanks Dann, Arthur, Mike, Jeffrey, and Bruno.  You've given me a
quick solution and a whole lot to chew on.  I never would have come up
with anything as creative.


Thanks again,

Mark


> -----Original Message-----
> From: Mark Fox [mailto:mark.fox@gmail.com]
> Sent: Wednesday, March 30, 2005 3:46 PM
> To: Dann Corbit
> Cc: pgsql-general@postgresql.org
> Subject: Re: [GENERAL] Days in month query
>
> 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 <DCorbit@connx.com>
> 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: pgsql-general-owner@postgresql.org
> > [mailto:pgsql-general-owner@postgresql.org] 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
> >
>

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