Yes
select distinct t1.pilot_id from pilot as t1 join match as t2 on t1.pilot_id = t2.winning_pilot
find the name and age of the pilot who has won the most number of times among the pilot who are younger than 30
select t1.name, t1.age from pilot as t1 join match as t2 on t1.pilot_id = t2.winning_pilot where t1.age < 30 group by t2.winning_pilot order by count ( * ) desc limit 1