SELECT last_name,first_name, avg(salary) as average_salary,count(distinct year) as years_worked from employees group by last_name,first_name having years_worked >2 order by average_salary desc
SELECT last_name,first_name, avg(salary) as average_salary,count(distinct year) as years_worked from employees group by last_name,first_name having years_worked >2 order by average_salary desc