181.超過經理收入的員工

解析 select a.Name as Employee from Employee as a, Employee as b where a.ManagerId = b.Id && a.Salary > b.Salary 把Employ看作2個表，a爲員工表，b爲經理表，且給員工也默認設置有ManagerId 通過select查詢 Name 並且 as爲 Employee 用where 判斷  員

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