注意值分別求得所有部門的最高薪資,在結果中用having 進行過濾
select a.dept_no, a.emp_no, b.salary
from dept_emp a, salaries b
where a.emp_no = b.emp_no and a.to_date = '9999-01-01' and b.to_date = '9999-01-01'
group by a.dept_no
having max(b.salary);
注意值分別求得所有部門的最高薪資,在結果中用having 進行過濾
select a.dept_no, a.emp_no, b.salary
from dept_emp a, salaries b
where a.emp_no = b.emp_no and a.to_date = '9999-01-01' and b.to_date = '9999-01-01'
group by a.dept_no
having max(b.salary);