Assume the position

SELECT * FROM gallery2 WHERE topic_id="1311611" UNION SELECT * FROM gallery2 WHERE topic_id="505319" UNION SELECT * FROM gallery2 WHERE topic_id="831909" UNION SELECT * FROM gallery2 WHERE topic_id="319543" UNION SELECT * FROM gallery2 WHERE topic_id="1803159" UNION SELECT * FROM gallery2 WHERE topic_id="860036" UNION SELECT * FROM gallery2 WHERE topic_id="735623" UNION SELECT * FROM gallery2 WHERE topic_id="1074409" UNION SELECT * FROM gallery2 WHERE topic_id="252789" UNION SELECT * FROM gallery2 WHERE topic_id="1138259" UNION SELECT * FROM gallery2 WHERE topic_id="90352" UNION SELECT * FROM gallery2 WHERE topic_id="1761496" UNION SELECT * FROM gallery2 WHERE topic_id="828181" UNION SELECT * FROM gallery2 WHERE topic_id="893960" UNION SELECT * FROM gallery2 WHERE topic_id="1481969" UNION SELECT * FROM gallery2 WHERE topic_id="4851"