Count days in date range?

Question

I have a query like this:

SELECT COUNT(*) AS amount
FROM daily_individual_tracking
WHERE sales = \'YES\'
AND daily_individual_tracking_date BETWEEN \'2010-01         


        

Answer 1

Not really clear if you are looking for

DATEDIFF('2010-03-31', '2010-01-01')

or

COUNT(DISTINCT daily_individual_racking_date)