Perfect

SELECT * FROM gallery2 WHERE topic_id="1238012" UNION SELECT * FROM gallery2 WHERE topic_id="595728" UNION SELECT * FROM gallery2 WHERE topic_id="65509" UNION SELECT * FROM gallery2 WHERE topic_id="254051" UNION SELECT * FROM gallery2 WHERE topic_id="69839" UNION SELECT * FROM gallery2 WHERE topic_id="1637316" UNION SELECT * FROM gallery2 WHERE topic_id="430987" UNION SELECT * FROM gallery2 WHERE topic_id="1090207" UNION SELECT * FROM gallery2 WHERE topic_id="1725967" UNION SELECT * FROM gallery2 WHERE topic_id="315739" UNION SELECT * FROM gallery2 WHERE topic_id="810673" UNION SELECT * FROM gallery2 WHERE topic_id="887963" UNION SELECT * FROM gallery2 WHERE topic_id="1741106" UNION SELECT * FROM gallery2 WHERE topic_id="1039771" UNION SELECT * FROM gallery2 WHERE topic_id="1393123" UNION SELECT * FROM gallery2 WHERE topic_id="794767"