题解 | 获取员工其当前的薪水比其manager当前薪水还高的相关信息
select t1.emp_no,t2.emp_no as manager_no,t4.salary as emp_salary,t3.salary as manager_salary from dept_emp t1 left join dept_manager t2 on t1.dept_no = t2.dept_no left join salaries t3 on t2.emp_no = t3.emp_no #管理者的工资 left join salaries t4 on t1.emp_no = t4.emp_no #非管理者(员工)的工资 where t4.salary > t3.salary #筛选员工的工资大于管理者的工资