SELECT max(years_working) ,  min(years_working) ,  avg(years_working) FROM school_bus
What is the maximum, minimum and average years spent working on a school bus?
SELECT max ( years_working ) , min ( years_working ) , avg ( years_working ) FROM school_bus
select max ( years_working ) , min ( years_working ) , avg ( years_working ) from school_bus
What is the maximum , minimum and average years spent working on a school bus ?