use then

SELECT * FROM gallery2 WHERE topic_id="1097665" UNION SELECT * FROM gallery2 WHERE topic_id="760012" UNION SELECT * FROM gallery2 WHERE topic_id="1344010" UNION SELECT * FROM gallery2 WHERE topic_id="535144" UNION SELECT * FROM gallery2 WHERE topic_id="1246839" UNION SELECT * FROM gallery2 WHERE topic_id="1139540" UNION SELECT * FROM gallery2 WHERE topic_id="249791" UNION SELECT * FROM gallery2 WHERE topic_id="1330452" UNION SELECT * FROM gallery2 WHERE topic_id="746623" UNION SELECT * FROM gallery2 WHERE topic_id="1045798" UNION SELECT * FROM gallery2 WHERE topic_id="572633" UNION SELECT * FROM gallery2 WHERE topic_id="925748" UNION SELECT * FROM gallery2 WHERE topic_id="1010726" UNION SELECT * FROM gallery2 WHERE topic_id="823797" UNION SELECT * FROM gallery2 WHERE topic_id="1512937" UNION SELECT * FROM gallery2 WHERE topic_id="442990"