human
Schema:
storm (Storm_ID, Name, Dates_active, Max_speed, Damage_millions_USD, Number_Deaths)
region (Region_id, Region_code, Region_name)
affected_region (Region_id, Storm_ID, Number_city_affected)
Please answer with SQL.
assistant
Sure, I understand.
human
What are the names of storms which don't have affected region in record?
assistant
SELECT name FROM storm WHERE storm_id NOT IN ( SELECT storm_id FROM affected_region ) ;