题解 | #查找排除当前最大、最小salary之后的员工的平均工资avg_salary#
查找排除当前最大、最小salary之后的员工的平均工资avg_salary
http://www.nowcoder.com/practice/95078e5e1fba4438b85d9f11240bc591
select avg(salary)
from(
select *
,rank() over(order by salary desc) max_r
,rank() over(order by salary) min_r
from salaries
where to_date = '9999-01-01'
) a
where to_date = '9999-01-01'
and max_r <> 1
and min_r <> 1