Task: Text to Code
Input (English): SQL: SELECT T1.customer_id , T1.customer_first_name FROM Customers AS T1 JOIN Customers_Cards AS T2 WHERE T2.card_number ! = "Credit"
Feedback: Need to make sure card type code not equals credit in step 2 instead of card number .
Output (English): 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"