You pick

SELECT * FROM gallery2 WHERE topic_id="1245223" UNION SELECT * FROM gallery2 WHERE topic_id="1744899" UNION SELECT * FROM gallery2 WHERE topic_id="864449" UNION SELECT * FROM gallery2 WHERE topic_id="124403" UNION SELECT * FROM gallery2 WHERE topic_id="373236" UNION SELECT * FROM gallery2 WHERE topic_id="650585" UNION SELECT * FROM gallery2 WHERE topic_id="1417601" UNION SELECT * FROM gallery2 WHERE topic_id="1444951" UNION SELECT * FROM gallery2 WHERE topic_id="1143157" UNION SELECT * FROM gallery2 WHERE topic_id="962075" UNION SELECT * FROM gallery2 WHERE topic_id="405318" UNION SELECT * FROM gallery2 WHERE topic_id="1264427" UNION SELECT * FROM gallery2 WHERE topic_id="557882" UNION SELECT * FROM gallery2 WHERE topic_id="1035243" UNION SELECT * FROM gallery2 WHERE topic_id="710508" UNION SELECT * FROM gallery2 WHERE topic_id="1796339"