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

with tmp as (
select t1.emp_no,t2.maxsal_2 as salary
from salaries as t1
inner join (select max(salary) as maxsal_2
from salaries
where salary < (select max(salary) as maxsal_1
from salaries)) as t2 on t1.salary = t2.maxsal_2)

select t1.emp_no,t1.salary,t2.last_name,t2.first_name
from tmp as t1
inner join employees as t2 on t1.emp_no = t2.emp_no;