CREATE TABLE member (member_id TEXT, name TEXT, nationality TEXT, role TEXT)
CREATE TABLE performance (performance_id DECIMAL, date TEXT, host TEXT, location TEXT, attendance DECIMAL)
CREATE TABLE member_attendance (member_id DECIMAL, performance_id DECIMAL, num_of_pieces DECIMAL)

Show the most common location of performances.
SELECT location FROM performance GROUP BY location ORDER BY COUNT(*) DESC LIMIT 1
SELECT "location" FROM "performance" GROUP BY "location" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1