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

List the names of mountains that do not have any climber.
SELECT name FROM mountain WHERE NOT mountain_id IN (SELECT mountain_id FROM climber)
SELECT "name" FROM "mountain" WHERE NOT "mountain_id" IN (SELECT "mountain_id" FROM "climber")