Hi Hari,
You need to turn your FROM clause around. Start with DLN1 and join ORDR. Something like this:
FROM DLN1 T0
INNER JOIN RDR1 T1 ON T0.BaseEntry = T1.DocEntry AND T0.BaseLine = T1.LineNum
INNER JOIN ORDR T2 ON T1.DocEntry = T2.DocEntry
Regards,
Johan