Compute totals and subtotals with model clause

Question

Please help,
I am using the model clause for the first time and need something like this, but no rule definition for every deptno:
SQL> select deptno, empno, ename, sal
  2    from emp
  3  model
  4    dimension by (deptno, empno, ename)
  5    measures(sal)
  6    rules (
  7       sal[10, null, 'ZZ-Sum'] = sum(sal)[10, any, any]
  8      ,sal[20, null, 'ZZ-Sum'] = sum(sal)[20, any, any]
  9      ,sal[30, null, 'ZZ-Sum'] = sum(sal)[30, any, any]
10      ,sal[null, null, 'ZZ-All'] = sum(sal)[any, any, 'ZZ-Sum']
11       )
12   order by deptno, empno, ename
13  /
    DEPTNO      EMPNO ENAME             SAL
        10       7782 CLARK            2450
        10       7839 KING             5000
        10       7934 MILLER           1300
        10            ZZ-Sum           8750
        20       7369 SMITH             800
        20       7566 JONES            2975
        20       7788 SCOTT            3000
        20       7876 ADAMS            1100
        20       7902 FORD             3000
        20            ZZ-Sum          10875
        30       7499 ALLEN            1600
        30       7521 WARD             1250
        30       7654 MARTIN           1250
        30       7698 BLAKE            2850
        30       7844 TURNER           1500
        30       7900 JAMES             950
        30            ZZ-Sum           9400
                      ZZ-All          29025
18 rows selected.Regards
eri

Answer 1

Many thanks to you! Your hint shows me, that in this case the model clause is not the right way to go.
The statement below fits exactly my requirements:
SQL> select
  2     g.deptno,
  3     e.empno,
  4     decode(g.grouping_empno,
  5        1, decode(g.deptno, null, 'All-Total:', 'Dept-Total:'),
  6           e.ename) emp_name,
  7     e.job, g.sum_sal salary
  8    from (select deptno, empno, grouping(empno) grouping_empno, sum(sal) sum_sal
  9            from emp
10           group by rollup(deptno, empno)
11           order by deptno, grouping(empno), empno) g, emp e
12   where g.empno = e.empno (+)
13  /
    DEPTNO      EMPNO EMP_NAME        JOB           SALARY
        10       7782 CLARK           MANAGER         2450
        10       7839 KING            PRESIDENT       5000
        10       7934 MILLER          CLERK           1300
        10            Dept-Total:                     8750
        20       7369 SMITH           CLERK            800
        20       7566 JONES           MANAGER         2975
        20       7788 SCOTT           ANALYST         3000
        20       7876 ADAMS           CLERK           1100
        20       7902 FORD            ANALYST         3000
        20            Dept-Total:                    10875
        30       7499 ALLEN           SALESMAN        1600
        30       7521 WARD            SALESMAN        1250
        30       7654 MARTIN          SALESMAN        1250
        30       7698 BLAKE           MANAGER         2850
        30       7844 TURNER          SALESMAN        1500
        30       7900 JAMES           CLERK            950
        30            Dept-Total:                     9400
                      All-Total:                     29025
18 rows selected.Regards
eri