This is more a matter of table structure and the changing of the way you think about how the employees, managers, etc. relate to each other in the database table. I've modified your table below by adding a StationID column:
EMPNO ENAME JOB StationID MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- -------------- ---------- --------------- ---------- ---------- ----------
7369 SMITH CLERK B01A1A 7902 17-DEC-80 800 20
7499 ALLEN SALESMAN B01B1 7698 20-FEB-81 1600 300 30
7521 WARD SALESMAN B01B2 7698 22-FEB-81 1250 500 30
7566 JONES MANAGER B01A 7839 02-APR-81 2975 20
7654 MARTIN SALESMAN B01B3 7698 28-SEP-81 1250 1400 30
7698 BLAKE MANAGER B01B 7839 01-MAY-81 2850 30
7782 CLARK MANAGER B01C 7839 09-JUN-81 2450 10
7788 SCOTT ANALYST B01A2 7566 19-APR-87 3000 20
7839 KING PRESIDENT B01 17-NOV-81 5000 10
7844 TURNER SALESMAN B01B4 7698 08-SEP-81 1500 0 30
7876 ADAMS CLERK B01A2A 7788 23-MAY-87 1100 20
7900 JAMES CLERK B01B5 7698 03-DEC-81 950 30
7902 FORD ANALYST B01A1 7566 03-DEC-81 3000 20
7934 MILLER CLERK B01C1 7782 23-JAN-82 1300 10
You can now delete the MGR column, as it is not needed. The StationID column tells you who each employees manager, Sr. Manager, and Administrator is by looking at the StationID. The previous query I sent allows you to select the president, Sr. Manager, Manager, etc. for the specific employee in question using the LIKE clause against the employee StationID.
Hope this helps.
Derrick Betts