What is the salaray and name of the employee that is certified to fly the most planes?
SELECT T1.name ,  T1.salary FROM Employee AS T1 JOIN Certificate AS T2 ON T1.eid  =  T2.eid GROUP BY T1.eid ORDER BY count(*) DESC LIMIT 1
certified to fly the most planes refers to MAX(COUNT(plane_id)); employee's name and salary refers to name, salary;