Database: codebase_community (difficulty: simple)
Question: How long did it take the user, known by his or her display name 'blue and grey' to get the badge? Count from the date the user's account was created.
SQL: SELECT T1.Date - T2.CreationDate FROM badges AS T1 INNER JOIN users AS T2 ON T1.UserId = T2.Id WHERE T2.DisplayName = 'blue and grey'