SELECT card_id, customer_id FROM Customers_Cards
Show the relationship between customer id and card id with a scatter chart.
CREATE TABLE Customers (
    customer_id INTEGER,
    customer_first_name VARCHAR(20),
    customer_last_name VARCHAR(20),
    customer_address VARCHAR(255),
    customer_phone VARCHAR(255),
    customer_email VARCHAR(255),
    other_customer_details VARCHAR(255)
)

CREATE TABLE Financial_Transactions (
    transaction_id INTEGER,
    previous_transaction_id INTEGER,
    account_id INTEGER,
    card_id INTEGER,
    transaction_type VARCHAR(15),
    transaction_date DATETIME,
    transaction_amount DOUBLE,
    transaction_comment VARCHAR(255),
    other_transaction_details VARCHAR(255)
)

CREATE TABLE Accounts (
    account_id INTEGER,
    customer_id INTEGER,
    account_name VARCHAR(50),
    other_account_details VARCHAR(255)
)

CREATE TABLE Customers_Cards (
    card_id INTEGER,
    customer_id INTEGER,
    card_type_code VARCHAR(15),
    card_number VARCHAR(80),
    date_valid_from DATETIME,
    date_valid_to DATETIME,
    other_card_details VARCHAR(255)
)