Can I get a query to get the output data like 4th column instead of 3rd col

Question

Can I get a query to get the output data like 4th column instead of 3rd column ?
SQL> select emp.deptno, empno, rownum from emp, dept where emp.deptno=dept.deptno;
DEPTNO EMPNO ROWNUM
10 7782 *1* *1*
10 7839 *2* *2*
10 7934 *3* *3*
20 7369 *4* *1*
20 7876 *5* *2*
20 7902 *6* *3*
20 7788 *7* *4*
20 7566 *8* *5*
30 7499 *9* *1*
30 7698 *10* *2*
30 7654 *11* *3*
30 7900 *12* *4*
30 7844 *13* *5*
30 7521 *14* *6*
14 rows selected.

Answer 1

SQL> select emp.deptno, emp.empno,
  2    row_number() over(order by emp.deptno, emp.empno) rn,
  3    row_number() over(partition by emp.deptno order by emp.empno) dept_rn
  4  from emp, dept
  5  where emp.deptno=dept.deptno
  6  order by emp.deptno, emp.empno;
    DEPTNO      EMPNO         RN    DEPT_RN
        10       7782          1          1
        10       7839          2          2
        10       7934          3          3
        20       7369          4          1
        20       7566          5          2
        20       7788          6          3
        20       7876          7          4
        20       7902          8          5
        30       7499          9          1
        30       7521         10          2
        30       7654         11          3
        30       7698         12          4
        30       7844         13          5
        30       7900         14          6
14 rows selected.Regards,
Dima