Show all artist names with an average exhibition attendance over 200.
CREATE TABLE artist (name VARCHAR, artist_id VARCHAR); CREATE TABLE exhibition (exhibition_id VARCHAR, artist_id VARCHAR); CREATE TABLE exhibition_record (exhibition_id VARCHAR, attendance INTEGER)
[SQL] SELECT T3.name FROM exhibition_record AS T1 JOIN exhibition AS T2 ON T1.exhibition_id = T2.exhibition_id JOIN artist AS T3 ON T3.artist_id = T2.artist_id GROUP BY T3.artist_id HAVING AVG(T1.attendance) > 200 [/SQL]