KNA1 - Customer master
KNB1 - Customer / company
KNVV - Customer sales data
KNBK - Bank details
KNVH - Customer hierarchy
KNVP - Customer partners
KNVS- Shipment data for customer
KNVK - Contact persons
KNVI - Customer master tax indicator
Table ADRC stores the address data for customer like street no, house no, search term ect..