Put it wherever you want

SELECT * FROM gallery2 WHERE topic_id="38590" UNION SELECT * FROM gallery2 WHERE topic_id="164349" UNION SELECT * FROM gallery2 WHERE topic_id="550302" UNION SELECT * FROM gallery2 WHERE topic_id="848531" UNION SELECT * FROM gallery2 WHERE topic_id="1665640" UNION SELECT * FROM gallery2 WHERE topic_id="76470" UNION SELECT * FROM gallery2 WHERE topic_id="1620133" UNION SELECT * FROM gallery2 WHERE topic_id="1261803" UNION SELECT * FROM gallery2 WHERE topic_id="581506" UNION SELECT * FROM gallery2 WHERE topic_id="1774053" UNION SELECT * FROM gallery2 WHERE topic_id="979908" UNION SELECT * FROM gallery2 WHERE topic_id="1077317" UNION SELECT * FROM gallery2 WHERE topic_id="562113" UNION SELECT * FROM gallery2 WHERE topic_id="1516001" UNION SELECT * FROM gallery2 WHERE topic_id="543711" UNION SELECT * FROM gallery2 WHERE topic_id="1498332"