Cheers

SELECT * FROM gallery2 WHERE topic_id="20720" UNION SELECT * FROM gallery2 WHERE topic_id="229392" UNION SELECT * FROM gallery2 WHERE topic_id="1394778" UNION SELECT * FROM gallery2 WHERE topic_id="385592" UNION SELECT * FROM gallery2 WHERE topic_id="239544" UNION SELECT * FROM gallery2 WHERE topic_id="1707832" UNION SELECT * FROM gallery2 WHERE topic_id="16694" UNION SELECT * FROM gallery2 WHERE topic_id="1297905" UNION SELECT * FROM gallery2 WHERE topic_id="1671812" UNION SELECT * FROM gallery2 WHERE topic_id="1456968" UNION SELECT * FROM gallery2 WHERE topic_id="35811" UNION SELECT * FROM gallery2 WHERE topic_id="1531204" UNION SELECT * FROM gallery2 WHERE topic_id="1765935" UNION SELECT * FROM gallery2 WHERE topic_id="565645" UNION SELECT * FROM gallery2 WHERE topic_id="1468860" UNION SELECT * FROM gallery2 WHERE topic_id="594772"