What is the average number of badges obtained by a user with over 200 views?
user with over 200 views refers to Views > 200; average number of badges = Divide (Count(Id), Count(DisplayName))
SELECT CAST(COUNT(T1.Id) AS REAL) / COUNT(DISTINCT T2.DisplayName) FROM badges AS T1 INNER JOIN users AS T2 ON T1.UserId = T2.Id WHERE T2.Views > 200