"we want to first select all of the values for ManagerID and then associate them with a name. We can do that with the following set of queries

SELECT EmployeeName AS Employee
FROM Employees
WHERE EmployeeID IN (SELECT DISTINCT ManagerID FROM Employees)"

Would it be the same if I were to write it like this without using a subquery?

select distinct managerID, employeename
from employees
where managerid <> null;

Thanks.