ลูกค้า Blanche Huels มีบัตรเครดิตกี่ใบ?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many credit cards does customer Blanche Huels have?It is not neccessary to use all the tables.
 Customers_cards:  (customer_id [ VARCHAR ] card_type_code [ VARCHAR) ]
SELECT COUNT(*) FROM Customers_cards AS T1 JOIN Customers AS T2 ON T1.customer_id = T2.customer_id WHERE T2.customer_first_name = "Blanche" AND T2.customer_last_name = "Huels" AND T1.card_type_code = "Credit"