MySQL 查询没有显示正确的结果

Question

我想指定有>=3名员工的部门，在每个部门后面打印出部门员工的列表。

我有 2 张 table :

Employee_Table (Employee_Number, Employee_Name, Department_Number)
Department (Department_Number, Department_Name)

这是我的 SQL 代码:

SELECT  ET.Department_Number,ET.Employee_Name
FROM dbo.Employee_Table ET
GROUP BY ET.Department_Number,ET.Employee_Name
HAVING COUNT(ET.Department_Number) >= 3

但是如果我运行什么也不会显示:

SELECT  ET.Department_Number
FROM dbo.Employee_Table ET
GROUP BY ET.Department_Number
HAVING COUNT(ET.Department_Number) >= 3

我有一个正确的结果，即 101 和 105，但与 Employee_Name 结合我无法得到正确的结果。

Answer 1

SELECT  
ET.Department_Number,
ET.Employee_Name
FROM Employee_Table ET
WHERE Department_Number IN
(   SELECT Department_Number
    FROM Employee_Table
    GROUP by Department_Number
    HAVING COUNT(*) >= 3
)