How to filter SQL results in a has-many-through relation

Question

Assuming I have the tables student, club, and student_club:

student {
    id
    name
}
club {
    id
    name
}
stude         


        

Answer 1

select *
from student
where id in (select student_id from student_club where club_id = 30)
and id in (select student_id from student_club where club_id = 50)