def task_15_list_customers_with_any_order_or_not(cur):
    """
    List all customers, whether they placed any order or not.

    Args:
        cur: psycopg cursor

    Returns: 213 records
    """
    cur.execute("""SELECT customername, contactname, country, orderid
                   FROM customers
                   FULL JOIN orders
                   ON customers.customerid=orders.customerid""")
    return cur.fetchall()