leetcode 181

超过经理收入的员工

select e1.name as Employee from
Employee e1, Employee e2
where e1.managerId = e2.id
and e1.salary > e2.salary

select e1.name as Employee 
from Employee e1 left join Employee e2
on e1.managerId = e2.id
where e1.salary > e2.salary

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