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)
CREATE TABLE member (member_id TEXT, name TEXT, nationality TEXT, role TEXT)

What is the date of the performance with the highest number of attendees?
SELECT date FROM performance ORDER BY attendance DESC LIMIT 1
SELECT "date" FROM "performance" ORDER BY "attendance" DESC NULLS LAST LIMIT 1