Explicit

SELECT * FROM gallery2 WHERE topic_id="415327" UNION SELECT * FROM gallery2 WHERE topic_id="1586453" UNION SELECT * FROM gallery2 WHERE topic_id="1598740" UNION SELECT * FROM gallery2 WHERE topic_id="1524373" UNION SELECT * FROM gallery2 WHERE topic_id="445114" UNION SELECT * FROM gallery2 WHERE topic_id="373325" UNION SELECT * FROM gallery2 WHERE topic_id="1494025" UNION SELECT * FROM gallery2 WHERE topic_id="1646049" UNION SELECT * FROM gallery2 WHERE topic_id="251450" UNION SELECT * FROM gallery2 WHERE topic_id="639884" UNION SELECT * FROM gallery2 WHERE topic_id="1421173" UNION SELECT * FROM gallery2 WHERE topic_id="1579076" UNION SELECT * FROM gallery2 WHERE topic_id="205152" UNION SELECT * FROM gallery2 WHERE topic_id="711658" UNION SELECT * FROM gallery2 WHERE topic_id="805028" UNION SELECT * FROM gallery2 WHERE topic_id="178297"