Number of fridays between two dates

Question

How do I find the number of fridays between two dates(including both the dates) using a select statement in oracle sql?

Answer 1

I have to throw in my two cents for using a calendar table. (It's a compulsion.)

select count(*) as num_fridays
from calendar
where day_of_week = 'Fri'
  and cal_date between '2011-01-01' and '2011-02-17';

num_fridays
-----------
6

Dead simple to understand. Takes advantage of indexes.

Maybe I should start a 12-step group. Calendar Table Anonymous.