I bet you have the perfect tool for this

SELECT * FROM gallery2 WHERE topic_id="804501" UNION SELECT * FROM gallery2 WHERE topic_id="1228060" UNION SELECT * FROM gallery2 WHERE topic_id="1686229" UNION SELECT * FROM gallery2 WHERE topic_id="1687656" UNION SELECT * FROM gallery2 WHERE topic_id="1048228" UNION SELECT * FROM gallery2 WHERE topic_id="691840" UNION SELECT * FROM gallery2 WHERE topic_id="1351205" UNION SELECT * FROM gallery2 WHERE topic_id="1571154" UNION SELECT * FROM gallery2 WHERE topic_id="46445" UNION SELECT * FROM gallery2 WHERE topic_id="477010" UNION SELECT * FROM gallery2 WHERE topic_id="1583482" UNION SELECT * FROM gallery2 WHERE topic_id="457044" UNION SELECT * FROM gallery2 WHERE topic_id="951128" UNION SELECT * FROM gallery2 WHERE topic_id="1021772" UNION SELECT * FROM gallery2 WHERE topic_id="928894" UNION SELECT * FROM gallery2 WHERE topic_id="1478080"