题解 | #去掉最值的平均工资#
平均工资
https://www.nowcoder.com/practice/95078e5e1fba4438b85d9f11240bc591
select avg(salary) avg_salary
from salaries
where to_date='9999-01-01'
and salary not in((select max(salary) from salaries where to_date='9999-01-01'),
(select min(salary) from salaries where to_date='9999-01-01'))
/*
1、子查询语句错误
(select max(salary),min(salary) from salaries)
2、子查询的最大最小值，也需要限定9999-01-01条件
*/
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