Q&A for professional mathematicians
SELECT eomonth(p.CreationDate) [month], COUNT(p.Id) AS [Total Posts], SUM(case when p.PostTypeId = 1 then 1 else 0 end) AS [Total Questions], SUM(case when p.PostTypeId = 2 then 1 else 0 end) AS [Total Answers] FROM PostsWithDeleted p GROUP BY eomonth(p.CreationDate) ORDER BY eomonth(p.CreationDate)