Query, Find the actor who has participated the most movies as "Principal Actor"

Question

I have these 2 tables:

1. movies:

movie_id	movie_name
1	Name1
2	Name2
3	Name3

2. people:

movie_id	person_name	role
1	name1	producer
2	name2	principal actor
3	name3	director

Each movie goes with 1 principal actor but this actor can also go as principal actor to a lot of movies, so, I want to find the person that played the most movies as principal actor, I want an output like this:

movie_name	person_name	role
movie1	name	principal actor
movie2	name	principal actor
movie3	name	principal actor

or maybe one like this:

person_name	count (as principal actor)
name	5

So far I've tried a subquery but I'm still a beginner and get many errors

Answer 1

You need to decide what the expected answer to your question is, your second choice would simply be

select person_name, Count(*) as PrincipleActor
from People
where role='principal actor'
group by person_name
order by PrincipleActor desc