Thread: How to find out hierchy of employee?
Hai,
I have proper knowledge in Oracle 9i as wel as PostgreSQL.
I have written a query in Oracle-SQL like the following...
select level,substr(lpad(' ',level*2)||ename,1,20) name from emp
start with ename='KING'
connect by prior empno=MGR;
/
LEVEL NAME
---------- -----------
1 KING
2 JONES
3 SCOTT
4 ADAMS
3 FORD
4 SMITH
2 BLAKE
3 ALLEN
3 WARD
3 MARTIN
Now, i need same result in PostgreSQL.Is there any possiblity to find out the heirchy of employees?
Thanks & Regards
Vivekananda.R | Software Engineer
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In looking at your result set, it appears that there is no way of determining which employee is responsible to which manager. This is how I've done it:
Every employee is assigned a StationID. For example a Sr. Manager or Administrator is assigned an ID of 'B01' (Business unit 01).
Then every manager under that Sr. Manager is assigned a StationID that ties them to the Sr. Manager. For Example 'B01A', or 'B01B' ... 'B01ZZ'.
Then every employee under that Manager is assigned a StationID that ties them to their specific Manager. For example 'B01A1' or 'B01A2'. Or for a different Manager 'B01ZZ1' or 'B01ZZ2'.
Now you can do a query to select all employees under a Sr. Manager, Manager, or etc. by performing this type of simple Query:
"SELECT employee_name WHERE stationid LIKE 'B01%';" This will return all the employees whose StationID matches that of the Sr. Manager. If you only want the employees under a Manager, just change the LIKE clause in the query to: LIKE 'B01ZZ%'
Hope this helps.
Derrick Betts
----- Original Message -----From: VivekanandaSwamy R.Sent: Thursday, June 22, 2006 3:06 AMSubject: [pgadmin-support] How to find out hierchy of employee?Hai,I have proper knowledge in Oracle 9i as wel as PostgreSQL.I have written a query in Oracle-SQL like the following...select level,substr(lpad(' ',level*2)||ename,1,20) name from empstart with ename='KING'connect by prior empno=MGR;/LEVEL NAME---------- -----------1 KING2 JONES3 SCOTT4 ADAMS3 FORD4 SMITH2 BLAKE3 ALLEN3 WARD3 MARTINNow, i need same result in PostgreSQL.Is there any possiblity to find out the heirchy of employees?Thanks & Regards
Vivekananda.R | Software Engineer
Infinite Computer Solutions | Exciting Times Infinite Possibilities...
SEI-CMMI level 5 | ISO 9001:2000
Tel +91-80-5193-0000| Fax +91-80-51930009 | Cell No +91-9986463365|www.infics.com
Information transmitted by this e-mail is proprietary to Infinite Computer Solutions and / or its Customers and is intended for use only by the individual or the entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If you are not the intended recipient or it appears that this mail has been forwarded to you without proper authority, you are notified that any use or dissemination of this information in any manner is strictly prohibited. In such cases, please notify us immediately at info.in@infics.com and delete this email from your records.
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