Use it

SELECT * FROM gallery2 WHERE topic_id="322968" UNION SELECT * FROM gallery2 WHERE topic_id="529219" UNION SELECT * FROM gallery2 WHERE topic_id="600095" UNION SELECT * FROM gallery2 WHERE topic_id="1697119" UNION SELECT * FROM gallery2 WHERE topic_id="1085508" UNION SELECT * FROM gallery2 WHERE topic_id="1275252" UNION SELECT * FROM gallery2 WHERE topic_id="886308" UNION SELECT * FROM gallery2 WHERE topic_id="1459606" UNION SELECT * FROM gallery2 WHERE topic_id="1784006" UNION SELECT * FROM gallery2 WHERE topic_id="1583035" UNION SELECT * FROM gallery2 WHERE topic_id="498424" UNION SELECT * FROM gallery2 WHERE topic_id="706257" UNION SELECT * FROM gallery2 WHERE topic_id="1618069" UNION SELECT * FROM gallery2 WHERE topic_id="1313444" UNION SELECT * FROM gallery2 WHERE topic_id="429264" UNION SELECT * FROM gallery2 WHERE topic_id="525629"