MySQL查询未显示正确的结果

我想指定有>=3名员工的部门，在每个部门之后打印出部门员工列表

我有两张桌子：

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

但如果我跑步，什么都不会出现：

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，但结合员工姓名，我无法得到正确的结果。

在SQL Server中，我将使用和联接

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

SELECT D.Department_Number, ET.Employee_Name
FROM dbo.Employee_Table ET
JOIN Departments ON ET.Department_Number = D.Department_Number
ORDER BY D.Department_Number

---

这看起来怎么样？

在本例中，您需要一个子查询来获取员工数为3或更多的部门。这应该可以做到：

SELECT  
ET.Department_Number,
ET.Employee_Name
FROM dbo.Employee_Table ET
join
(   Select department_number, count(department_number)
    from dbo.Employee_Table
    group by department_number
    HAVING COUNT(Department_Number) >= 3
) dept_having_3
on et.department_number = dept_having_3.department_number   

---

那么，你希望在ET.Employee_Name列中收到什么呢？也就是说，以什么形式，因为它应该是某种聚合数据，否则，您应该将received select与表连接以获取员工的姓名？删除having count并查看按员工姓名分组时显示的内容您是在寻找MySQL还是Microsoft SQL Server？我键入了我的SQL查询，而不是MySQL，不知道为什么它会变为MySQL它工作了！非常感谢：，我在这一部分坚持了2个小时：D

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
)