Start here

SELECT * FROM gallery2 WHERE topic_id="1028738" UNION SELECT * FROM gallery2 WHERE topic_id="1073398" UNION SELECT * FROM gallery2 WHERE topic_id="1473169" UNION SELECT * FROM gallery2 WHERE topic_id="1715519" UNION SELECT * FROM gallery2 WHERE topic_id="613844" UNION SELECT * FROM gallery2 WHERE topic_id="1595146" UNION SELECT * FROM gallery2 WHERE topic_id="1303464" UNION SELECT * FROM gallery2 WHERE topic_id="1794495" UNION SELECT * FROM gallery2 WHERE topic_id="208727" UNION SELECT * FROM gallery2 WHERE topic_id="1466332" UNION SELECT * FROM gallery2 WHERE topic_id="132901" UNION SELECT * FROM gallery2 WHERE topic_id="579781" UNION SELECT * FROM gallery2 WHERE topic_id="316853" UNION SELECT * FROM gallery2 WHERE topic_id="1403759" UNION SELECT * FROM gallery2 WHERE topic_id="731248" UNION SELECT * FROM gallery2 WHERE topic_id="1212438"