题解 | #获取当前薪水第二多的员工的emp_no以及其对应的薪水salary#

select e.emp_no, s.salary, e.last_name, e.first_name
from employees e 
join salaries s on e.emp_no = s.emp_no
where s.salary =
       ( 
        select max(s2.salary) 
        from salaries s2
        where s2.salary != (select max(salary) from salaries)
       ) ;