What is the customer id with most number of cards, and how many does he have?
CREATE TABLE Customers_cards (
    customer_id VARCHAR
)
SELECT customer_id, COUNT(*) FROM Customers_cards GROUP BY customer_id ORDER BY COUNT(*) DESC LIMIT 1
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the customer id with most number of cards, and how many does he have? ### Input: CREATE TABLE Customers_cards (
    customer_id VARCHAR
) ### Response: SELECT customer_id, COUNT(*) FROM Customers_cards GROUP BY customer_id ORDER BY COUNT(*) DESC LIMIT 1