Count days between two dates, excluding weekends (MySQL only)

Question

I need to calculate the difference (in days) between two dates in MySQL excluding weekends (Saturday and Sunday). That is, the difference in days minus the number of Saturda

Answer 1

You can use a dates table:

tbl_dates

dow is 'day of week' in my table. Then your query looks like this:

SELECT Count(theDate) AS numWeekDays
FROM tbl_dates
WHERE theDate >[startDate] And theDate <=[endDate] AND dow <> 1 AND dow <> 7;

In this case, 1 and 7 are Sunday, Saturday, respectively (which is the default) and, of course, you can nest that into another query if you need to calculate this for many startDate(s) and endDate(s).