Você pode ter mais de uma coluna especificada para
GROUP BY
tente isso:SELECT user_id, order_id, MAX(order_date) FROM orders
GROUP BY order_id, user_id
HAVING
MAX(order_date) < '2012-01-20'
GROUP BY
tente isso:SELECT user_id, order_id, MAX(order_date) FROM orders
GROUP BY order_id, user_id
HAVING
MAX(order_date) < '2012-01-20'