create or replace view v_emp
as
select d.deptNo,d.dname,count(empNo) c ,avg(sal) avg
from Emp e right join Dept d on d.deptNo = e.deptNo
group by d.deptNo,d.dname
having avg(sal) > 2000
order by avg(sal) desc;
1.3 视图权限的授权
conn system/system;
grant create any view to scott;