> I think it is likely that your query could be improved. Am I right in

assuming that you want

> there in ALL cases where there is an RPL_PO_ITM to also exist at least

one RPL_POBILL_ITM

> record and that all matching RPL_POBILL_ITM must have COST defined?

No. In all cases for each RPL_PO_ITM.NDC (RPL_PO_ITM is a child of
RPL_PO) there must be a matching RPL_POBILL_ITM.NDC (RPL_POBILL_ITM is a
child of RPL_POBILL). Also for each RPL_POBILL_ITM.NDC there must be a
matching RPL_PO_ITM.NDC. The NULL COST and PRICE is to see if there is
nothing on the other side of the left join.
In short, all children of both related parents (there is a joke there
somewhere) must match exactly on NDC.


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