Query that uses the "SCOTT" schema (tables EMP, DEPT, BONUS, SALGRADE, DUMMY) as CTEs, in Oracle SQL

scott-oracle-cte.sql

with dummy as (
  select 0 as dummy from dual
), dept AS (
  select 10 as deptno, 'ACCOUNTING' as dname, 'NEW YORK' as loc from dual union all
  select 20, 'RESEARCH',   'DALLAS'  from dual union all
  select 30, 'SALES',      'CHICAGO' from dual union all
  select 40, 'OPERATIONS', 'BOSTON' from dual
), emp AS (
  select 7839 as empno, 'KING' as ename, 'PRESIDENT' as job, null as mgr, date '1981-11-17' as hiredate, 5000 as sal, null as comm, 10 as deptno from dual union all
  select 7698, 'BLAKE',  'MANAGER',   7839, to_date('1-5-1981','dd-mm-yyyy'),      2850, null, 30 from dummy union all
  select 7782, 'CLARK',  'MANAGER',   7839, to_date('9-6-1981','dd-mm-yyyy'),      2450, null, 10 from dummy union all
  select 7566, 'JONES',  'MANAGER',   7839, to_date('2-4-1981','dd-mm-yyyy'),      2975, null, 20 from dummy union all
  select 7788, 'SCOTT',  'ANALYST',   7566, to_date('13-JUL-87','dd-mm-rr') - 85,  3000, null, 20 from dummy union all
  select 7902, 'FORD',   'ANALYST',   7566, to_date('3-12-1981','dd-mm-yyyy'),     3000, null, 20 from dummy union all
  select 7369, 'SMITH',  'CLERK',     7902, to_date('17-12-1980','dd-mm-yyyy'),     800, null, 20 from dummy union all
  select 7499, 'ALLEN',  'SALESMAN',  7698, to_date('20-2-1981','dd-mm-yyyy'),     1600,  300, 30 from dummy union all
  select 7521, 'WARD',   'SALESMAN',  7698, to_date('22-2-1981','dd-mm-yyyy'),     1250,  500, 30 from dummy union all
  select 7654, 'MARTIN', 'SALESMAN',  7698, to_date('28-9-1981','dd-mm-yyyy'),     1250, 1400, 30 from dummy union all
  select 7844, 'TURNER', 'SALESMAN',  7698, to_date('8-9-1981','dd-mm-yyyy'),      1500,    0, 30 from dummy union all
  select 7876, 'ADAMS',  'CLERK',     7788, to_date('13-JUL-87', 'dd-mm-rr') - 51, 1100, null, 20 from dummy union all
  select 7900, 'JAMES',  'CLERK',     7698, to_date('3-12-1981','dd-mm-yyyy'),      950, null, 30 from dummy union all
  select 7934, 'MILLER', 'CLERK',     7782, to_date('23-1-1982','dd-mm-yyyy'),     1300, null, 10 from dummy)
select d.deptno, avg(sal),
 (select avg(sal) from emp where deptno = d.deptno) as avg_sal
from dept d
join emp e on e.deptno = d.deptno
where e.job <> 'ANALYST'
group by d.deptno;