Q&A for scientific skepticism
SELECT DATEPART(yyyy, Posts.CreationDate) AS Year, DATEPART(mm, Posts.CreationDate) AS Month, Tags.TagName AS ProgrammingLanguage, COUNT(*) AS NumQuestions FROM Posts INNER JOIN PostTags ON Posts.Id = PostTags.PostId INNER JOIN Tags ON Tags.Id = PostTags.TagId WHERE Posts.PostTypeId = 1 -- 1 for Questions AND Tags.TagName IN ('c', 'c++', 'python', 'rust') -- your programming languages here AND DATEPART(yyyy, Posts.CreationDate) = 2015 GROUP BY DATEPART(yyyy, Posts.CreationDate), DATEPART(mm, Posts.CreationDate), Tags.TagName ORDER BY Year, Month, NumQuestions DESC