Potential

SELECT * FROM gallery2 WHERE topic_id="1823606" UNION SELECT * FROM gallery2 WHERE topic_id="168023" UNION SELECT * FROM gallery2 WHERE topic_id="308075" UNION SELECT * FROM gallery2 WHERE topic_id="511308" UNION SELECT * FROM gallery2 WHERE topic_id="1500606" UNION SELECT * FROM gallery2 WHERE topic_id="1105471" UNION SELECT * FROM gallery2 WHERE topic_id="957383" UNION SELECT * FROM gallery2 WHERE topic_id="1099307" UNION SELECT * FROM gallery2 WHERE topic_id="1408463" UNION SELECT * FROM gallery2 WHERE topic_id="11405" UNION SELECT * FROM gallery2 WHERE topic_id="1338045" UNION SELECT * FROM gallery2 WHERE topic_id="169433" UNION SELECT * FROM gallery2 WHERE topic_id="474766" UNION SELECT * FROM gallery2 WHERE topic_id="1288343" UNION SELECT * FROM gallery2 WHERE topic_id="1579470" UNION SELECT * FROM gallery2 WHERE topic_id="144915"