Something Simple

SELECT * FROM gallery2 WHERE topic_id="917718" UNION SELECT * FROM gallery2 WHERE topic_id="1685132" UNION SELECT * FROM gallery2 WHERE topic_id="829001" UNION SELECT * FROM gallery2 WHERE topic_id="1510966" UNION SELECT * FROM gallery2 WHERE topic_id="1499894" UNION SELECT * FROM gallery2 WHERE topic_id="1239421" UNION SELECT * FROM gallery2 WHERE topic_id="335568" UNION SELECT * FROM gallery2 WHERE topic_id="1651083" UNION SELECT * FROM gallery2 WHERE topic_id="147720" UNION SELECT * FROM gallery2 WHERE topic_id="652262" UNION SELECT * FROM gallery2 WHERE topic_id="628171" UNION SELECT * FROM gallery2 WHERE topic_id="1615100" UNION SELECT * FROM gallery2 WHERE topic_id="115515" UNION SELECT * FROM gallery2 WHERE topic_id="313373" UNION SELECT * FROM gallery2 WHERE topic_id="1791931" UNION SELECT * FROM gallery2 WHERE topic_id="28132"