Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE orders (order_id VARCHAR, customer_id VARCHAR, date_order_placed VARCHAR)
### Question:
what are the order id and customer id of the oldest order?
### Answer:
SELECT order_id, customer_id FROM orders ORDER BY date_order_placed LIMIT 1