In Table KNVP what is the releation between the two fields,
KUNNR and KUNN2
KNVP table is used to maintain the partner functions of Sold To Party or Payer etc..
If you are looking for partner functions of a Sold to party then KUNNR is the actual sold to party number
and KUNN2 is its partner number (either shipto or payer).
The different partners are identified by their partner function (PARVW).