what is the name of customer id 1?
select customer_first_name, customer_last_name from customers where customer_id = 1
what type of card is used by customer id 6?
select card_type_code from customers_cards where customer_id = 6
what  is the  address of customer id 2?
select customer_address from customers where customer_id = 2
Show id,first and last names for all customers with at least two cards?
select t1.customer_id, t2.customer_first_name, t2.customer_last_name from customers_cards as t1 join customers as t2 on t1.customer_id = t2.customer_id group by t1.customer_id having count ( * ) > = 2