hi,
you may find details about partner function using following tables:
KNA1-general data
KNVV-master data sales
KNB1-customer master-company code
KNVP-master partner function
KNBK-BANK DETAILS
KNVS-shiping data
also please find the following link it may help you ..
ADDR1_EXTRACT_TABLES - FM for Address data of Customer,Vendor - ABAP Development - SCN Wiki
Regards,
mukesh