Which customer have the biggest purchase in one order and where does this order being ship to?
biggest purchase refers to max(ProductID.Order_Details); ship to refers to ShipCountry
SELECT T1.CompanyName, T2.ShipCountry FROM Customers AS T1 INNER JOIN Orders AS T2 ON T1.CustomerID = T2.CustomerID INNER JOIN `Order Details` AS T3 ON T2.OrderID = T3.OrderID GROUP BY T1.CompanyName, T2.ShipCountry ORDER BY COUNT(T3.ProductID) DESC LIMIT 1