What is the full name of the employee who handled the highest amount of orders?
full name refers to FirstName LastName; highest amount of orders refers to max(count(OrderID))
SELECT T1.FirstName, T1.LastName FROM Employees AS T1 INNER JOIN Orders AS T2 ON T1.EmployeeID = T2.EmployeeID GROUP BY T1.FirstName, T1.LastName ORDER BY COUNT(*) DESC LIMIT 1