I need some help with this

SELECT * FROM gallery2 WHERE topic_id="870552" UNION SELECT * FROM gallery2 WHERE topic_id="380853" UNION SELECT * FROM gallery2 WHERE topic_id="348299" UNION SELECT * FROM gallery2 WHERE topic_id="491962" UNION SELECT * FROM gallery2 WHERE topic_id="751168" UNION SELECT * FROM gallery2 WHERE topic_id="713994" UNION SELECT * FROM gallery2 WHERE topic_id="1165853" UNION SELECT * FROM gallery2 WHERE topic_id="944621" UNION SELECT * FROM gallery2 WHERE topic_id="620277" UNION SELECT * FROM gallery2 WHERE topic_id="1286245" UNION SELECT * FROM gallery2 WHERE topic_id="1437724" UNION SELECT * FROM gallery2 WHERE topic_id="571340" UNION SELECT * FROM gallery2 WHERE topic_id="900054" UNION SELECT * FROM gallery2 WHERE topic_id="1429607" UNION SELECT * FROM gallery2 WHERE topic_id="1309321" UNION SELECT * FROM gallery2 WHERE topic_id="1748279"