Question: Great! Can you tell me which, if any, customers on this list appear more than once?
SQL: SELECT T2.customer_name From customer_address_history AS T1 JOIN customers AS T2 ON T1.customer_id   =   T2.customer_id JOIN addresses AS T3 ON T1.address_id   =   T3.address_id GROUP BY T2.customer_name having count ( * )  > 1