I have 2 tables: CUST and ADDR. First I’ll describe the data and then the query needed.

CUST TABLE
Has PK CUST_ID and FK/composite unique key (CUST_NUM, CONTACT_NUM). A record exists on CUST for each organization (ABC Company) as well as a record for each contact within an organization (Jon Doe “contact at” ABC Company), with each having a unique CUST_ID. Organizations will have a CONTACT_NUM = 0 and may be assigned to...