题解 | 平均工资

平均工资

https://www.nowcoder.com/practice/95078e5e1fba4438b85d9f11240bc591

select avg(salary) as avg_salary 
from (select *,salary-max(salary) over() as m1,salary-min(salary) over() as m2 
from salaries 
where to_date='9999-01-01') as p1 
where not (m1=0 or m2=0);

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