Database: codebase_community
Question: State all the tags used by Mark Meckes in his posts that doesn't have comments.
SQL: SELECT T3.Tags FROM users AS T1 INNER JOIN postHistory AS T2 ON T1.Id = T2.UserId INNER JOIN posts AS T3 ON T3.Id = T2.PostId WHERE T1.DisplayName = 'Mark Meckes' AND T3.CommentCount = 0