SELECT * FROM bid WHERE user_id = 25 AND (auction_id = 2012 OR auction_id = 2016);
+--------+------------+---------+---------------------+
| id | auction_id | user_id | created |
+--------+------------+---------+---------------------+
| 226458 | 2012 | 25 | 2011-05-02 08:01:32 |
| 226465 | 2016 | 25 | 2011-05-03 06:39:44 |
| 226467 | 2016 | 25 | 2011-05-03 06:39:47 |
+--------+------------+---------+---------------------+