Database: student_club (difficulty: simple)
Question: List the names of closed event as "Registration" that was closed from 3/15/2019 to 3/20/2020.
SQL: SELECT DISTINCT event_name FROM event WHERE type = 'Registration' AND date(SUBSTR(event_date, 1, 10)) BETWEEN '2019-03-15' AND '2020-03-20' AND status = 'Closed'