Q&A for ebook publishers and readers
SELECT DATEFROMPARTS( DATEPART(yyyy, CreationDate), DATEPART(mm, CreationDate), 1) AS Month, COUNT(DeletionDate) AS Deleted, COUNT(CASE WHEN DeletionDate IS NOT NULL OR ClosedDate IS NOT NULL THEN 1 ELSE NULL END) AS ClosedOrDeleted, COUNT(*) AS AllQuestions/* COUNT(CASE WHEN DeletionDate IS NULL AND ClosedDate IS NULL THEN 1 ELSE NULL END) AS [Open]*/ FROM PostsWithDeleted WHERE PostTypeId=1 GROUP BY DATEFROMPARTS( DATEPART(yyyy, CreationDate), DATEPART(mm, CreationDate), 1) ORDER BY Month