A snack you should try

SELECT * FROM gallery2 WHERE topic_id="263312" UNION SELECT * FROM gallery2 WHERE topic_id="1791376" UNION SELECT * FROM gallery2 WHERE topic_id="1676333" UNION SELECT * FROM gallery2 WHERE topic_id="971498" UNION SELECT * FROM gallery2 WHERE topic_id="280944" UNION SELECT * FROM gallery2 WHERE topic_id="564803" UNION SELECT * FROM gallery2 WHERE topic_id="24548" UNION SELECT * FROM gallery2 WHERE topic_id="34246" UNION SELECT * FROM gallery2 WHERE topic_id="186446" UNION SELECT * FROM gallery2 WHERE topic_id="91752" UNION SELECT * FROM gallery2 WHERE topic_id="195205" UNION SELECT * FROM gallery2 WHERE topic_id="1005169" UNION SELECT * FROM gallery2 WHERE topic_id="1621255" UNION SELECT * FROM gallery2 WHERE topic_id="979889" UNION SELECT * FROM gallery2 WHERE topic_id="388380" UNION SELECT * FROM gallery2 WHERE topic_id="706659"