List the distinct payment method codes with the number of orders made
SELECT payment_method_code ,  count(*) FROM INVOICES GROUP BY payment_method_code
SELECT payment_method_code ,  count(*) FROM INVOICES GROUP BY payment_method_code
[{'payment_method_code': 'American E', 'count(*)': 4}, {'payment_method_code': 'MasterCard', 'count(*)': 6}, {'payment_method_code': 'Visa', 'count(*)': 5}]