Question

I’m using Oracle 10g.

If i have the following duplicate rows (Same Employee with two Employee numbers):

Employee_No      Employee_Name      ID_NO
----------------------------------------------
0002345          John Debb          100345642
0030988          John Debb          100345642
----------------------------------------------

i want to get the result as:

Employee_No_1      Employee_No_2     Employee Name    ID_NO
----------------------------------------------------------------
0002345            0030988           John Debb        100345642
----------------------------------------------------------------

Is it possible to be done in SQL? or it needs PL/SQL? and what would the query be?

Answer 1

Not quite in the format requested, but this will handle the case where there could be more than just 2 duplicates.

SELECT e.Employee_No, e.Employee_Name, e.ID_NO
    FROM (SELECT Employee_Name, ID_NO
              FROM Employee
              GROUP BY Employee_Name, ID_NO
              HAVING COUNT(*) > 1) q
        INNER JOIN Employee e
            ON q.Employee_Name = e.Employee_Name
                AND q.ID_NO = e.ID_NO
    ORDER BY e.Employee_Name, e.ID_NO, e.Employee_No