📅  最后修改于: 2022-03-11 15:05:16.254000             🧑  作者: Mango
Alter VIEW Tests AS
SELECT Dept_Name, EMP1.Emp_Name, EMP2.Emp_Name AS Dept_Boss
FROM Dept
JOIN EMP EMP1 on Dept_Emp = EMP1.Emp_ID
JOIN EMP EMP2 on Dept_Boss = EMP2.Emp_ID