SELECT T2.card_type_code ,  count(*) FROM Financial_transactions AS T1 JOIN Customers_cards AS T2 ON T1.card_id  =  T2.card_id GROUP BY T2.card_type_code
Show the card type codes and the number of transactions.
SELECT T2.card_type_code , count ( * ) FROM Financial_transactions AS T1 JOIN Customers_cards AS T2 ON T1.card_id = T2.card_id GROUP BY T2.card_type_code
select t2 . card_type_code , count ( * ) from financial_transactions as t1 join customers_cards as t2 on t1 . card_id = t2 . card_id group by t2 . card_type_code
Show the card type codes and the number of transactions .