Query for BOM

Question

Hi All,
I need a query which displays for an spicific BOM child item
all its parent items in the hierarchical structure
For example: the Table ITT1 consists of following rows
child_item  parent_item
I1             P1
I1             P2
P1            P3
P2            P4
I1              P5
the query I need should display
child_item  parent_item1  parent_item2
I1              P1                 P3
I1              P2                 P4
I1              P5

Answer 1

Hi All,
thank you for the quick answers, but I have already found the solution, how to display for an spisific item all it's parent items in all assembly levels.
It can be done with recursive function calls:
CREATE FUNCTION dbo.GetParentItems(@ChildItem nvarchar(20))
RETURNS @retParentItems TABLE(ChildItem nvarchar(20), ParentItem nvarchar(20))
AS 
BEGIN
     DECLARE  @Item nvarchar(20), @ParentItem nvarchar(20)
     DECLARE RetrieveParentItems CURSOR STATIC LOCAL FOR
     SELECT Code, Father FROM ITT1 WHERE Code=@ChildItem
     OPEN RetrieveParentItems
     FETCH NEXT FROM RetrieveParentItems
     INTO @Item, @ParentItem
     WHILE (@@FETCH_STATUS = 0)
     BEGIN
          INSERT INTO @retParentItems
          SELECT * FROM dbo.GetParentItems(@ParentItem)
          INSERT INTO @retParentItems
          VALUES(@Item,@ParentItem)     
     --     set @Level = @Level + 1     
          FETCH NEXT FROM RetrieveParentItems
          INTO @Item, @ParentItem
     END
     CLOSE RetrieveParentItems
     DEALLOCATE RetrieveParentItems
     RETURN
END
GO