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