Question: what are the names of the payment method of customers who have both mailshot in 'Order' outcome and mailshot in 'No response' outcome.
SQL: SELECT T2.customer_name ,  T2.payment_method FROM mailshot_customers AS T1 JOIN customers AS T2 ON T1.customer_id   =   T2.customer_id WHERE T1.outcome_code   =   'Order' INTERSECT SELECT T2.customer_name ,  T2.payment_method FROM mailshot_customers AS T1 JOIN customers AS T2 ON T1.customer_id   =   T2.customer_id WHERE T1.outcome_code   =   'No Response'