create materialized view STORE_DEPT_SAL_MV
tablespace MVIEWS
build deferred
refresh complete
enable query rewrite
as
select d.DNAME, sum(SAL) as tot_sum
  from DEPT d, EMP e
 where d.DEPTNO = e.DEPTNO
group by d.DNAME;

create materialized view STORE_DEPT_SAL_MV
tablespace MYMVIEWS
parallel
build immediate
refresh fast on commit
enable query rewrite
as
select d.DNAME, sum(SAL) as tot_sum
  from DEPT d, EMP e
 where d.DEPTNO = e.DEPTNO
group by d.DNAME;