Perfect ^^

SELECT * FROM gallery2 WHERE topic_id="450613" UNION SELECT * FROM gallery2 WHERE topic_id="1022265" UNION SELECT * FROM gallery2 WHERE topic_id="856373" UNION SELECT * FROM gallery2 WHERE topic_id="977891" UNION SELECT * FROM gallery2 WHERE topic_id="1506840" UNION SELECT * FROM gallery2 WHERE topic_id="1371251" UNION SELECT * FROM gallery2 WHERE topic_id="7053" UNION SELECT * FROM gallery2 WHERE topic_id="798585" UNION SELECT * FROM gallery2 WHERE topic_id="937086" UNION SELECT * FROM gallery2 WHERE topic_id="1554561" UNION SELECT * FROM gallery2 WHERE topic_id="318262" UNION SELECT * FROM gallery2 WHERE topic_id="377464" UNION SELECT * FROM gallery2 WHERE topic_id="1483328" UNION SELECT * FROM gallery2 WHERE topic_id="1214140" UNION SELECT * FROM gallery2 WHERE topic_id="585621" UNION SELECT * FROM gallery2 WHERE topic_id="1117870"