CREATE TABLE affected_region (region_id NUMBER, storm_id NUMBER, number_city_affected NUMBER)
CREATE TABLE storm (storm_id NUMBER, name CLOB, dates_active CLOB, max_speed NUMBER, damage_millions_usd NUMBER, number_deaths NUMBER)
CREATE TABLE region (region_id NUMBER, region_code CLOB, region_name CLOB)

What are the names of storms that did not affect any regions?
SELECT name FROM storm WHERE NOT storm_id IN (SELECT storm_id FROM affected_region)
SELECT "name" FROM "storm" WHERE NOT "storm_id" IN (SELECT "storm_id" FROM "affected_region")