将2个SQL语句合并为1

Question

我想选择收入高于经理人的员工。我有下面写的这些SQL语句，但是我究竟如何将它们组合成一个语句呢？

SELECT E.Salary
FROM Employee E
WHERE E.ManagerId = E.Id

SELECT *
FROM Employee M
WHERE M.Salary > E.Salary AND M.ManagerId != M.Id

Answer 1

//

Answer 2

你可以使用自我内部联接

SELECT E.*
FROM Employee E
INNER JOIN Employee M ON  E.ManagerId = M.Id
WHERE E.Salary > M.Salary

Answer 3

了解加入，例如：

SELECT E.* 
FROM Employee E 
    JOIN Employee M ON E.ManagerId = M.Id 
WHERE E.Salary>M.Salary;