Q&A for professional mathematicians
SELECT eomonth(p.CreationDate) [month], COUNT(p.Id) AS [Questions], SUM(p.AnswerCount) AS [Answers] FROM Posts p WHERE p.CreationDate >= '##Date1?2015-01-01##' AND p.CreationDate <= '##Date2?2021-01-01##' and (p.ClosedDate IS NOT NULL) and (p.PostTypeId=1) GROUP BY eomonth(p.CreationDate) ORDER BY eomonth(p.CreationDate)