SELECT customer_id ,  customer_first_name FROM Customers EXCEPT SELECT T1.customer_id ,  T2.customer_first_name FROM Customers_cards AS T1 JOIN Customers AS T2 ON T1.customer_id  =  T2.customer_id WHERE card_type_code  =  "Credit"
What are the ids and first names of customers who do not hold a credit card?
SELECT customer_id , customer_first_name FROM Customers EXCEPT SELECT T1.customer_id , T2.customer_first_name FROM Customers_cards AS T1 JOIN Customers AS T2 ON T1.customer_id = T2.customer_id WHERE card_type_code = `` Credit ''
select customer_id , customer_first_name from customers except select t1 . customer_id , t2 . customer_first_name from customers_cards as t1 join customers as t2 on t1 . customer_id = t2 . customer_id where card_type_code = value
What are the ids and first names of customers who do not hold a credit card ?