Chained

SELECT * FROM gallery2 WHERE topic_id="84046" UNION SELECT * FROM gallery2 WHERE topic_id="219295" UNION SELECT * FROM gallery2 WHERE topic_id="945383" UNION SELECT * FROM gallery2 WHERE topic_id="1688988" UNION SELECT * FROM gallery2 WHERE topic_id="834451" UNION SELECT * FROM gallery2 WHERE topic_id="262048" UNION SELECT * FROM gallery2 WHERE topic_id="550318" UNION SELECT * FROM gallery2 WHERE topic_id="153295" UNION SELECT * FROM gallery2 WHERE topic_id="633923" UNION SELECT * FROM gallery2 WHERE topic_id="1725765" UNION SELECT * FROM gallery2 WHERE topic_id="1680690" UNION SELECT * FROM gallery2 WHERE topic_id="864547" UNION SELECT * FROM gallery2 WHERE topic_id="414952" UNION SELECT * FROM gallery2 WHERE topic_id="1671399" UNION SELECT * FROM gallery2 WHERE topic_id="1712553" UNION SELECT * FROM gallery2 WHERE topic_id="464159"