CREATE PROCEDURE [dbo].[uspGetManagerEmployees]
    @BusinessEntityID [int]
AS

BEGIN
    SET NOCOUNT ON;

    -- Use recursive query to list out all Employees required for a particular Manager
    WITH [EMP_cte]([BusinessEntityID], [OrganizationNode], [FirstName], [LastName], [RecursionLevel]) -- CTE name and columns
    AS (
        SELECT e.[BusinessEntityID], e.[OrganizationNode], p.[FirstName], p.[LastName], 0 -- Get the initial list of Employees for Manager n
        FROM [HumanResources].[Employee] e 
            INNER JOIN [Person].[Person] p 
            ON p.[BusinessEntityID] = e.[BusinessEntityID]
        WHERE e.[BusinessEntityID] = @BusinessEntityID
        UNION ALL
        SELECT e.[BusinessEntityID], e.[OrganizationNode], p.[FirstName], p.[LastName], [RecursionLevel] + 1 -- Join recursive member to anchor
        FROM [HumanResources].[Employee] e 
            INNER JOIN [EMP_cte]
            ON e.[OrganizationNode].GetAncestor(1) = [EMP_cte].[OrganizationNode]
            INNER JOIN [Person].[Person] p 
            ON p.[BusinessEntityID] = e.[BusinessEntityID]
        )
    -- Join back to Employee to return the manager name 
    SELECT [EMP_cte].[RecursionLevel], [EMP_cte].[OrganizationNode].ToString() as [OrganizationNode], p.[FirstName] AS 'ManagerFirstName', p.[LastName] AS 'ManagerLastName',
        [EMP_cte].[BusinessEntityID], [EMP_cte].[FirstName], [EMP_cte].[LastName] -- Outer select from the CTE
    FROM [EMP_cte] 
        INNER JOIN [HumanResources].[Employee] e 
        ON [EMP_cte].[OrganizationNode].GetAncestor(1) = e.[OrganizationNode]
            INNER JOIN [Person].[Person] p 
            ON p.[BusinessEntityID] = e.[BusinessEntityID]
    ORDER BY [RecursionLevel], [EMP_cte].[OrganizationNode].ToString()
    OPTION (MAXRECURSION 25) 
END;