CREATE TABLE manufacturers (code NUMBER, name CLOB, headquarter CLOB, founder CLOB, revenue NUMBER)
CREATE TABLE products (code NUMBER, name CLOB, price NUMBER, manufacturer NUMBER)

What are the names of products produced by both Creative Labs and Sony?
SELECT T1.name FROM products AS T1 JOIN manufacturers AS T2 ON T1.manufacturer = T2.code WHERE T2.name = 'Creative Labs' INTERSECT SELECT T1.name FROM products AS T1 JOIN manufacturers AS T2 ON T1.manufacturer = T2.code WHERE T2.name = 'Sony'
SELECT "T1"."name" FROM "products" "T1" JOIN "manufacturers" "T2" ON "T1"."manufacturer" = "T2"."code" AND "T2"."name" = 'Creative Labs' INTERSECT SELECT "T1"."name" FROM "products" "T1" JOIN "manufacturers" "T2" ON "T1"."manufacturer" = "T2"."code" AND "T2"."name" = 'Sony'