Task: Text to Code
Input (English): Step 1: find the customer_id of Accounts table.
Step 2: find the number of rows in Customers_Cards table whose Customers_Cards's customer_id not one of the results of step 1
Output (English): SELECT Count ( * ) FROM Customers_Cards AS T1 WHERE T1.customer_id NOT IN ( SELECT T2.customer_id FROM Accounts AS T2 )