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