พล็อตแผนภูมิกระจาย รหัสลูกค้าตาม card_number ไม่จำเป็นต้องใช้ตารางทั้งหมด
Plot a scatter chart, customer id by card_number.It is not neccessary to use all the tables.
 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)] 
SELECT customer_id, card_number FROM Customers_Cards