题解 | #获取每个部门中当前员工薪水最高的相关信息#

SELECT a.dept_no, a.emp_no, a.salary as maxSalary

FROM (
select d.dept_no, d.emp_no, s.salary
,RANK()over(partition by d.dept_no order by s.salary DESC) as rk
FROM dept_emp as d, salaries as s
WHERE d.emp_no = s.emp_no
and d.to_date='9999-01-01'
and s.to_date='9999-01-01'
) AS a

where rk ='1'