CREATE TABLE affected_region (storm_id VARCHAR)
CREATE TABLE storm (name VARCHAR)

Show all storm names except for those with at least two affected regions.
SELECT name FROM storm EXCEPT SELECT T1.name FROM storm AS T1 JOIN affected_region AS T2 ON T1.storm_id = T2.storm_id GROUP BY T1.storm_id HAVING COUNT(*) >= 2
SELECT "name" FROM "storm" EXCEPT SELECT "T1"."name" FROM "storm" AS "T1" JOIN "affected_region" AS "T2" ON "T1"."storm_id" = "T2"."storm_id" GROUP BY "T1"."storm_id" HAVING COUNT(*) >= 2