Chained

SELECT * FROM gallery2 WHERE topic_id="1504099" UNION SELECT * FROM gallery2 WHERE topic_id="1714106" UNION SELECT * FROM gallery2 WHERE topic_id="914691" UNION SELECT * FROM gallery2 WHERE topic_id="592804" UNION SELECT * FROM gallery2 WHERE topic_id="876115" UNION SELECT * FROM gallery2 WHERE topic_id="795827" UNION SELECT * FROM gallery2 WHERE topic_id="1440691" UNION SELECT * FROM gallery2 WHERE topic_id="495961" UNION SELECT * FROM gallery2 WHERE topic_id="922241" UNION SELECT * FROM gallery2 WHERE topic_id="1122567" UNION SELECT * FROM gallery2 WHERE topic_id="767130" UNION SELECT * FROM gallery2 WHERE topic_id="1472480" UNION SELECT * FROM gallery2 WHERE topic_id="528216" UNION SELECT * FROM gallery2 WHERE topic_id="506675" UNION SELECT * FROM gallery2 WHERE topic_id="491649" UNION SELECT * FROM gallery2 WHERE topic_id="487900"