Multiple parents tree (or digraph) implementation sql server 2005

Question

I need to implement a multi-parented tree (or digraph) onto SQL Server 2005. I\'ve read several articles, but most of them uses single-parented trees with a unique root like

Answer 1

If you dont want to do the inserts suggested by Ronald,this would do!.

WITH CTE_MultiParent  (ID, ParentID) 
AS 
(
    SELECT ID, ParentID FROM #ObjectRelations
    WHERE ID NOT IN 
    (
        SELECT DISTINCT ParentID FROM #ObjectRelations
    )
    UNION ALL
    SELECT ObjR.ID, ObjR.ParentID FROM #ObjectRelations ObjR INNER JOIN CTE_MultiParent
    ON CTE_MultiParent.ParentID = ObjR.Id
)

SELECT DISTINCT * FROM CTE_MultiParent