题解 | #获取每个部门中当前员工薪水最高的相关信息#

select d.dept_no,
d.emp_no,
salary maxSalary
from dept_emp d join salaries s on d.emp_no=s.emp_no
where (dept_no,salary) in (
select dept_no,max(salary) 
from dept_emp d join salaries s on d.emp_no=s.emp_no
group by d.dept_no)
order by dept_no

简单直观