How can I know the last manager of employee

Question

My Dears:
I'D to know the last manager of employee
for example in hr schema if i enter the emplyee_id I want to know the last manager for him
I Make a function but I want a query statement
thanks in advance

Answer 1

Hi,
Please specify what you mean by last manager?
If you mean, previous manager:
You can try something like this...
--Test Data
CREATE TABLE emp_manager
empid NUMBER,
manager NUMBER,
start_date DATE,
end_date DATE
INSERT INTO emp_manager values (100,200,'1-JAN-00','31-DEC-05');
INSERT INTO emp_manager values (100,202,'1-JAN-06','31-DEC-10');
INSERT INTO emp_manager values (100,204,'1-JAN-11',null);
COMMIT;
--Generalized SQL for getting the previous managers
SELECT manager FROM
SELECT manager, ((COUNT(*) OVER (PARTITION BY empid))-ROWNUM) morder
FROM emp_manager
WHERE empid = 100 --Pass EMP ID here
ORDER BY start_date DESC)
WHERE morder = 1; --Pass 0 for current manager and 1 for previous manager and 2 for manager before previous manager and so on..Results:
   MANAGER
       202Hope it helps..
Regards,
Rakesh
Edited by: Rakesh Desai on Mar 28, 2011 3:12 PM