表系
Employee表
目前還沒有任何員工的業務部。所以,我相信查詢將還檢索的行(圖像1):
部門編號= 10,DEPARTMENT_NAME =運營,僱員= 0
爲什麼犯規發生???
SELECT EMPLOYEE.Department_ID, DEPARTMENT.Department_Name, Count(*) AS Employees
FROM EMPLOYEE right JOIN DEPARTMENT ON DEPARTMENT.Department_ID = EMPLOYEE.Department_ID
GROUP BY DEPARTMENT.Department_Name,.EMPLOYEE.Department_ID
我試過了,但結果是Department_ID = null,Department_Name = Operations,Employee = 1(不能發生) – apkos99
正確 - 這將是這種情況下的結果。我重寫了您的查詢,瞭解我相信您在尋找的內容。 – nybbler
工作很好..謝謝 – apkos99