Tight

SELECT * FROM gallery2 WHERE topic_id="257775" UNION SELECT * FROM gallery2 WHERE topic_id="1582675" UNION SELECT * FROM gallery2 WHERE topic_id="1309244" UNION SELECT * FROM gallery2 WHERE topic_id="887893" UNION SELECT * FROM gallery2 WHERE topic_id="1786120" UNION SELECT * FROM gallery2 WHERE topic_id="746504" UNION SELECT * FROM gallery2 WHERE topic_id="1100669" UNION SELECT * FROM gallery2 WHERE topic_id="1236003" UNION SELECT * FROM gallery2 WHERE topic_id="1173592" UNION SELECT * FROM gallery2 WHERE topic_id="477595" UNION SELECT * FROM gallery2 WHERE topic_id="1068108" UNION SELECT * FROM gallery2 WHERE topic_id="1053766" UNION SELECT * FROM gallery2 WHERE topic_id="1303461" UNION SELECT * FROM gallery2 WHERE topic_id="727960" UNION SELECT * FROM gallery2 WHERE topic_id="996090" UNION SELECT * FROM gallery2 WHERE topic_id="1622003"