One of the best ways to start

SELECT * FROM gallery2 WHERE topic_id="1204695" UNION SELECT * FROM gallery2 WHERE topic_id="139096" UNION SELECT * FROM gallery2 WHERE topic_id="574531" UNION SELECT * FROM gallery2 WHERE topic_id="822874" UNION SELECT * FROM gallery2 WHERE topic_id="243180" UNION SELECT * FROM gallery2 WHERE topic_id="985552" UNION SELECT * FROM gallery2 WHERE topic_id="799300" UNION SELECT * FROM gallery2 WHERE topic_id="56688" UNION SELECT * FROM gallery2 WHERE topic_id="1503652" UNION SELECT * FROM gallery2 WHERE topic_id="239649" UNION SELECT * FROM gallery2 WHERE topic_id="1566792" UNION SELECT * FROM gallery2 WHERE topic_id="1601940" UNION SELECT * FROM gallery2 WHERE topic_id="734018" UNION SELECT * FROM gallery2 WHERE topic_id="1108079" UNION SELECT * FROM gallery2 WHERE topic_id="809862" UNION SELECT * FROM gallery2 WHERE topic_id="711892"