Compose correct SQL query?

Question

MySQL

There are two such tables. It is necessary to display the names of departments in which the number of employees does not exceed 3 people.
select department_id
from employee
group by department_id
having count(*) <= 3 // Display the IDs of these departments, but how do we display the department names?

Answer 1

select id, name
from department
where id in (
  select department_id
  from employee
  group by department_id
  having count(*) <= 3
)

It is better, of course, to break into two requests.

Answer 2

use join