double blacked

SELECT * FROM gallery2 WHERE topic_id="875830" UNION SELECT * FROM gallery2 WHERE topic_id="552892" UNION SELECT * FROM gallery2 WHERE topic_id="1269798" UNION SELECT * FROM gallery2 WHERE topic_id="708278" UNION SELECT * FROM gallery2 WHERE topic_id="1678340" UNION SELECT * FROM gallery2 WHERE topic_id="528628" UNION SELECT * FROM gallery2 WHERE topic_id="983594" UNION SELECT * FROM gallery2 WHERE topic_id="1427958" UNION SELECT * FROM gallery2 WHERE topic_id="624327" UNION SELECT * FROM gallery2 WHERE topic_id="707472" UNION SELECT * FROM gallery2 WHERE topic_id="428752" UNION SELECT * FROM gallery2 WHERE topic_id="650187" UNION SELECT * FROM gallery2 WHERE topic_id="956032" UNION SELECT * FROM gallery2 WHERE topic_id="1074554" UNION SELECT * FROM gallery2 WHERE topic_id="356109" UNION SELECT * FROM gallery2 WHERE topic_id="504423"