CREATE TABLE track (track_id NUMBER, name CLOB, location CLOB, seating NUMBER, year_opened NUMBER)
CREATE TABLE race (race_id NUMBER, name CLOB, class CLOB, date CLOB, track_id CLOB)

What are the locations that have both tracks with more than 90000 seats, and tracks with fewer than 70000 seats?
SELECT location FROM track WHERE seating > 90000 INTERSECT SELECT location FROM track WHERE seating < 70000
SELECT "location" FROM "track" WHERE "seating" > 90000 INTERSECT SELECT "location" FROM "track" WHERE "seating" < 70000