SELECT OrderID FROM dbo.Orders
WHERE EmployeeID =(SELECT EmployeeID FROM dbo.Employees WHERE LastName LIKE N'D%');
括号中有多个结果时,正确的做法是用“in”代替“=”,就可以出正确结果
微信扫一扫
SELECT OrderID FROM dbo.Orders
WHERE EmployeeID =(SELECT EmployeeID FROM dbo.Employees WHERE LastName LIKE N'D%');
括号中有多个结果时,正确的做法是用“in”代替“=”,就可以出正确结果
相关推荐