For all canonical tags, what is the average question score and the average answer score?
Q&A for people interested in the history and origins of science and mathematics
SELECT TagName , Answers.Id AS [Post Link] FROM Tags INNER JOIN PostTags ON PostTags.TagId=Tags.Id INNER JOIN Posts AS Questions ON Questions.Id=PostTags.PostId INNER JOIN Posts AS Answers ON Answers.ParentId=Questions.Id WHERE Answers.PostTypeId=2 ORDER BY TagName