CREATE TABLE mountain (mountain_id DECIMAL, name TEXT, height DECIMAL, prominence DECIMAL, range TEXT, country TEXT)
CREATE TABLE climber (climber_id DECIMAL, name TEXT, country TEXT, time TEXT, points DECIMAL, mountain_id DECIMAL)

Which range contains the most mountains?
SELECT range FROM mountain GROUP BY range ORDER BY COUNT(*) DESC LIMIT 1
SELECT "range" FROM "mountain" GROUP BY "range" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1