Recursive query - response (3) by gerardo

Try,

WITH RECURSIVE REC_TBL ( emp_id, boss_id ) AS
(SELECT
emp_id, (boss_id) AS boss_id FROM employee_tbl
UNION ALL
SELECT a.emp_id, b.boss_id
FROM REC_TBL A , employee_tbl b
WHERE a.boss_id = b.emp_id

)
SELECT
*
FROM REC_TBL