Which school has the least number of players?
select t2.school from player as t1 join school as t2 on t1.school_id = t2.school_id group by t1.school_id order by count(*) asc limit 1;
How about with the most players?
select t2.school from player as t1 join school as t2 on t1.school_id = t2.school_id group by t1.school_id order by count(*) desc limit 1;
Show me the denomination of this school.
select t2.denomination from player as t1 join school as t2 on t1.school_id = t2.school_id group by t1.school_id order by count(*) desc limit 1;