SQL query to get the list of supervisor hierarchy. employee --> supervisor --> supervisor

Question

I have two tables Employee and Department this image shows the manager of every employee. I want to write a SQL query that gives me a list of all the supervisor (Mana

Answer 1

This is the solution to my question

  with recursive p as (
WITH emp_dept as(
SELECT employee_id,manager_id 
FROM employee,department
WHERE employee.dept_id= department.dept_id
) 

select e1.employee_id, e1.manager_id
from   emp_dept e1
where  e1.employee_id = 202

union 

select e2.employee_id , e2.manager_id
from   p
join   emp_dept e2 ON e2.employee_id = p.manager_id

)
select manager_id
  from   p

Answer 2

I think you can use "hierarchical queries" for Oracle and try this:

select manager_id supervisor 
from employee
start with employee_id = 202
connect by nocycle employee_id = prior manager_id;