รหัสประเภทไพ่ที่มีตั้งแต่ 5 ใบขึ้นไปมีรหัสอะไรบ้าง ไม่จำเป็นต้องใช้ทุกตาราง
What are the codes of card types that have 5 or more cards?It is not neccessary to use all the tables.
 customers:  customer_id [ number]  customer_first_name [ text]  customer_last_name [ text]  customer_address [ text]  customer_phone [ text]  customer_email [ text]  other_customer_details [ text] 
SELECT card_type_code FROM customers_cards GROUP BY card_type_code HAVING COUNT(*) >= 5