column|customer_id|nullable|number(6)
column|cust_first_name|nullable|varchar2(20)
column|cust_last_name|nullable|varchar2(20)
column|cust_address|nullable|cust_address_typ
column|phone_numbers|nullable|phone_list_typ
column|nls_language|nullable|varchar2(3)
column|nls_territory|nullable|varchar2(30)
column|credit_limit|nullable|number(9,2)
column|cust_email|nullable|varchar2(30)
column|cust_orders|nullable|order_list_typ