Q&A about the site for speakers of German wanting to discuss the finer points of the language and translation
SELECT Users.Id, Users.DisplayName, Users.Reputation, Users.Location, Users.Age FROM ( SELECT Users.Id, COUNT(*) AS num_questions FROM Posts INNER JOIN PostTags ON Posts.Id = PostTags.PostId INNER JOIN Tags ON Tags.Id = PostTags.TagId INNER JOIN Users ON Users.Id = Posts.OwnerUserId WHERE Tags.TagName = 'ruby-on-rails' AND Posts.PostTypeId=1 GROUP BY Users.Id ) AS T LEFT JOIN Users ON Users.Id = T.Id ORDER BY num_questions DESC