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

You can use the MySQL datediff function:

SELECT DATEDIFF('2010-01-01','2010-01-31') AS DiffDays

It should return a floating point, where 1.0 represents a single day.

And for MS SQL use ,

SELECT DATEDIFF( day ,'2010-01-01','2010-01-31') AS DiffDays