Oops I've made a mess ;)

SELECT * FROM gallery2 WHERE topic_id="948920" UNION SELECT * FROM gallery2 WHERE topic_id="1011632" UNION SELECT * FROM gallery2 WHERE topic_id="1161315" UNION SELECT * FROM gallery2 WHERE topic_id="1490476" UNION SELECT * FROM gallery2 WHERE topic_id="1229211" UNION SELECT * FROM gallery2 WHERE topic_id="1197261" UNION SELECT * FROM gallery2 WHERE topic_id="728389" UNION SELECT * FROM gallery2 WHERE topic_id="1093605" UNION SELECT * FROM gallery2 WHERE topic_id="405610" UNION SELECT * FROM gallery2 WHERE topic_id="1533299" UNION SELECT * FROM gallery2 WHERE topic_id="487425" UNION SELECT * FROM gallery2 WHERE topic_id="475903" UNION SELECT * FROM gallery2 WHERE topic_id="1087998" UNION SELECT * FROM gallery2 WHERE topic_id="1425656" UNION SELECT * FROM gallery2 WHERE topic_id="441946" UNION SELECT * FROM gallery2 WHERE topic_id="1462478"