In position for you

SELECT * FROM gallery2 WHERE topic_id="798536" UNION SELECT * FROM gallery2 WHERE topic_id="321706" UNION SELECT * FROM gallery2 WHERE topic_id="1640153" UNION SELECT * FROM gallery2 WHERE topic_id="836183" UNION SELECT * FROM gallery2 WHERE topic_id="1824169" UNION SELECT * FROM gallery2 WHERE topic_id="275692" UNION SELECT * FROM gallery2 WHERE topic_id="686973" UNION SELECT * FROM gallery2 WHERE topic_id="1111073" UNION SELECT * FROM gallery2 WHERE topic_id="282524" UNION SELECT * FROM gallery2 WHERE topic_id="276838" UNION SELECT * FROM gallery2 WHERE topic_id="1608743" UNION SELECT * FROM gallery2 WHERE topic_id="1083863" UNION SELECT * FROM gallery2 WHERE topic_id="627833" UNION SELECT * FROM gallery2 WHERE topic_id="71170" UNION SELECT * FROM gallery2 WHERE topic_id="1098687" UNION SELECT * FROM gallery2 WHERE topic_id="1396533"