What is the name of the company that has the product with the highest unit price?
name of the company refers to CompanyName; the highest unit price refers to MAX(UnitPrice)
SELECT T2.CompanyName FROM Products AS T1 INNER JOIN Suppliers AS T2 ON T1.SupplierID = T2.SupplierID WHERE T1.UnitPrice = ( SELECT MAX(UnitPrice) FROM Products )