Display Tree Nodes from LDIF

Question

I have to read the contents form an ldif file and display it with in a tree, in that the first dn, should be displayed as root dn, and next as child nodes with all the properties of dn.
I displayed all the dn's but am not understanding how to take root dn and child nodes. please help me if any one know.
Thanks,
Raga

Answer 1

Hi,
When you delete a node and all of its children, what do you want to do with the grandchildren? If you want to set their parent_id to NULL, do that in a separate UPDATE statement first, then DELETE the original node and all its remaining descendants, as show below.
If, when you say "children", you mean "descendants" (including
children,
children of children,
children of children of children,
and so on, to any level,
) then do a CONNECT BY query to find their primary keys, and DELETE everything in that list, like this:
DELETE  subforms
WHERE   id  IN
        SELECT  id
        FROM    subforms
        START WITH        id = :specified_id
        CONNECT BY  PRIOR id = parent_id
        );