Not sure if your requirements are actually fulfilled by the following, but it should at least generate your samples:
SELECT ap."Sales Order", ap."Item", ep."Schedule Line", ep."Delivery Date", ep."Confirmed Qty"
FROM "VBAP" ap
INNER JOIN
(SELECT TOP 1 "Sales Order", "Item", "Schedule Line", "Delivery Date", "Confirmed Qty"
FROM "VBEP"
ORDER BY "Confirmed Qty" DESC) ep
ON ap."Sales Order" = ep."Sales Order";
Looking at the sample result sets it looks as if it would be possible to select the data only based on "VBEP", but I assumed that there are some more selection criteria that you want to apply based on "VBAP".
Also, and don't take this the wrong way, but it is really a SQL beginner's question. So if you are going to develop more SQL it might be a good choice to top up your game and learn more about SQL programming.
- Lars