struct<c_customer_id:string,c_salutation:string,c_first_name:string,c_last_name:string,c_preferred_cust_flag:string,c_birth_day:int,c_birth_month:int,c_birth_year:int,c_birth_country:string,c_login:string,c_email_address:string,c_last_review_date:int,ctr_total_return:decimal>
