Re: Days in month query

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От Dann Corbit
Тема Re: Days in month query
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Msg-id D425483C2C5C9F49B5B7A41F89441547055A4C@postal.corporate.connx.com
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Ответ на Days in month query  (Mark Fox <mark.fox@gmail.com>)
Ответы Re: Days in month query  (Mark Fox <mark.fox@gmail.com>)
Список pgsql-general
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

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