Database: codebase_community (difficulty: simple)
Question: What is the title of the post that is owned by hannes.koller and has the highest popularity?
SQL: SELECT T1.Title FROM posts AS T1 INNER JOIN users AS T2 ON T1.OwnerUserId = T2.Id WHERE T2.DisplayName = 'hannes.koller' ORDER BY T1.ViewCount DESC LIMIT 1