Perfect

SELECT * FROM gallery2 WHERE topic_id="863921" UNION SELECT * FROM gallery2 WHERE topic_id="605199" UNION SELECT * FROM gallery2 WHERE topic_id="394885" UNION SELECT * FROM gallery2 WHERE topic_id="1652222" UNION SELECT * FROM gallery2 WHERE topic_id="967117" UNION SELECT * FROM gallery2 WHERE topic_id="260909" UNION SELECT * FROM gallery2 WHERE topic_id="169653" UNION SELECT * FROM gallery2 WHERE topic_id="1766588" UNION SELECT * FROM gallery2 WHERE topic_id="104882" UNION SELECT * FROM gallery2 WHERE topic_id="402232" UNION SELECT * FROM gallery2 WHERE topic_id="1174271" UNION SELECT * FROM gallery2 WHERE topic_id="1510195" UNION SELECT * FROM gallery2 WHERE topic_id="785205" UNION SELECT * FROM gallery2 WHERE topic_id="1144914" UNION SELECT * FROM gallery2 WHERE topic_id="1677680" UNION SELECT * FROM gallery2 WHERE topic_id="711992"