题解 | 平均工资
平均工资
https://www.nowcoder.com/practice/95078e5e1fba4438b85d9f11240bc591
select
avg(salary)
from
salaries
where
to_date = '9999-01-01'
and (
salary <> (
select
max(salary)
from
salaries
where to_date = '9999-01-01'
)
and salary <> (
select
min(salary)
from
salaries
where to_date = '9999-01-01'
)
)
