Perfect

SELECT * FROM gallery2 WHERE topic_id="1794365" UNION SELECT * FROM gallery2 WHERE topic_id="605406" UNION SELECT * FROM gallery2 WHERE topic_id="1683715" UNION SELECT * FROM gallery2 WHERE topic_id="563427" UNION SELECT * FROM gallery2 WHERE topic_id="1458110" UNION SELECT * FROM gallery2 WHERE topic_id="601611" UNION SELECT * FROM gallery2 WHERE topic_id="564535" UNION SELECT * FROM gallery2 WHERE topic_id="855015" UNION SELECT * FROM gallery2 WHERE topic_id="1617788" UNION SELECT * FROM gallery2 WHERE topic_id="645242" UNION SELECT * FROM gallery2 WHERE topic_id="34464" UNION SELECT * FROM gallery2 WHERE topic_id="1322080" UNION SELECT * FROM gallery2 WHERE topic_id="1507489" UNION SELECT * FROM gallery2 WHERE topic_id="83797" UNION SELECT * FROM gallery2 WHERE topic_id="980272" UNION SELECT * FROM gallery2 WHERE topic_id="1364173"