SQL Count Of Open Orders Each Day Between Two Dates

Question

I\'ve tried searching but it\'s likely I\'m using the wrong keywords as I can\'t find an answer.

I\'m trying to find the number of orders that are open between two d

Answer 1

Join Dates to the result of the join between Employees and Orders, then group by dates and employees to obtain the counts, something like this:

SELECT
  d.Date,
  o.Employee,
  COUNT(*) AS count
FROM Employees e
  INNER JOIN Orders o ON e.ID = o.Employee
  INNER JOIN Dates d ON d.Date BETWEEN o.Opened AND o.Closed
GROUP BY
  d.Date,
  o.Employee