Need help for a query - database

Question

my current query is:
public function teachers_manage() {
$this->db->select('users.user_id, teacher_id, COUNT(student_id) AS S, COUNT(DISTINCT(users.class)) AS C, schools.region, schools.school_name');
$this->db->from('teacher_student_conn');
$this->db->join('users', 'teacher_student_conn.student_id=users.user_id','left');
$this->db->join('schools', 'schools.school_id=users.school_id');
$this->db->where('users.deactivated_at = "0000-00-00 00:00:00" OR users.deactivated_at IS NULL ');
$this->db->where('users.role_id', '1');
$this->db->group_by("teacher_student_conn.teacher_id");
$result=$this->db->get();
return $result->result();
}
It shows me teachers and for each teacher number of classes he teaches and number of students he teaches. I have made join 2 tables - users and teacher_student_conn by users=user_id=teacher_student_conn.student_id and I've put where clause for student not to be deactivated - shows active students. But how to do that also fot the teachers? Another join will change the results. I only want to add where clause for teachers to be active.
My tables look like this:
users
user_id
school_id
class
role_id
created_at
deactivated_at
teacher-student_conn
id
teacher_id
student_id
created_at

Answer 1

I suggest to add a column for "status" to more easily distinguish the status of student and teacher.
And this is my recommended query
SQL Query:
select
from users a
join teacher-student_conn b on a.user_id = b.student_id
join schools c on c.school_id = a.school_id
where (a.status = "Deactivated") and (b.status = "Deactivated")
For codeigniter:
$this->db->select('a.user_id, b.teacher_id, COUNT(b.student_id) AS S, COUNT(DISTINCT(a.class)) AS C, c.region, c.school_name');
$this->db->join('teacher_student_conn b', 'b.student_id = a.user_id','left');
$this->db->join('schools c', 'c.school_id = a.school_id');
$this->db->where('a.status = "Deactivated" or b.status = "Deactivated" ');
$this->db->where('a.role_id', '1');
$this->db->group_by("b.teacher_id");
$result=$this->db->get("users a");
return $result->result();