Can you list the number of airports whose names contain the word "International"?
select count ( * ) from airports where name like '%international%'
What is the most common country of all of those airports?
select country from airports group by country order by count ( * ) desc limit 1
What is the greatest elevation of all of those airports?
select max ( elevation ) from airports
What is the minimum elevation?
select min ( elevation ) from airports
What country is the airport with the lowest elevation located in?
select country from airports where elevation = ( select min ( elevation ) from airports )