sql查询以便检索数据

Question

我想要找回薪水比经理少的员工姓名。

例如：

Employee_Lastname：WARX

Employee_Firstname：CYNTHIA

MANAGER_NANE：SMITH

Warx Cythnia的经理是Manager_ID = 7369谁是Smith John，因为Smith的Employee_ID = 7369。此外，Warx的薪水小于史密斯（1575 <8900）

SELECT  a.Employee_LastName, a.Employee_Firstname 
FROM    EMPLOYEE a
    LEFT JOIN EMPLOYEE b
        ON a.Manager_ID = b.Employee_ID AND a.Employee_Salary > b.Employee_Salary

Answer 1

这与您之前的问题略有修改，

SELECT  a.Employee_LastName,
        a.Employee_FirstName,
        b.Employee_LastName AS MANAGER_LASTNAME
FROM    EmpTable a
        LEFT JOIN EmpTable b
            ON a.Manager_ID = b.Employee_ID
WHERE   a.employee_salary < b.employee_salary

Answer 2

尝试：

SELECT e1.employee_id, e1.lastname, e1.firstname
FROM employee e1 INNER JOIN employee e2 ON e1.manager_id = e2.employee_id
WHERE e1.employee_salary < e2.employee_salary

Answer 3

Select Employee_Firstname
From Employee worker
INNER JOIN Employee manager ON worker.Employee_ID = manager.Manager_ID
AND worker.Employee_Salary < manager.Employee_Salary