How many have greater than 5?
select count(*) from (select * from albums as t1 join tracks as t2 on t1.id = t2.album_id group by t1.id having count(t1.id) > 15);
greater than 10?
select count(*) from (select * from albums as t1 join tracks as t2 on t1.id = t2.album_id group by t1.id having count(t1.id) > 10);
What are their titles?
select t1.title from albums as t1 join tracks as t2 on t1.id = t2.album_id group by t1.id having count(t1.id) > 10;