Question: What are the names of products produced by both Creative Labs and Sony?
SQL: 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'