UNF

SELECT * FROM gallery2 WHERE topic_id="1248183" UNION SELECT * FROM gallery2 WHERE topic_id="825067" UNION SELECT * FROM gallery2 WHERE topic_id="868410" UNION SELECT * FROM gallery2 WHERE topic_id="1712568" UNION SELECT * FROM gallery2 WHERE topic_id="716571" UNION SELECT * FROM gallery2 WHERE topic_id="658473" UNION SELECT * FROM gallery2 WHERE topic_id="1182526" UNION SELECT * FROM gallery2 WHERE topic_id="1087980" UNION SELECT * FROM gallery2 WHERE topic_id="1545393" UNION SELECT * FROM gallery2 WHERE topic_id="841546" UNION SELECT * FROM gallery2 WHERE topic_id="1381025" UNION SELECT * FROM gallery2 WHERE topic_id="1432669" UNION SELECT * FROM gallery2 WHERE topic_id="1815809" UNION SELECT * FROM gallery2 WHERE topic_id="1343047" UNION SELECT * FROM gallery2 WHERE topic_id="639808" UNION SELECT * FROM gallery2 WHERE topic_id="1357592"