select name
from (
select name,count(*) as cont
from category natural join film
where category.category_id=film.category_id
group by name
having cont = (select max(cont) from(select name, count(*) as cont
              from category natural join film
          where category.category_id=film.category_id
          group by name)as a)
)as aux
order by 1 asc;