double blacked

SELECT * FROM gallery2 WHERE topic_id="1217658" UNION SELECT * FROM gallery2 WHERE topic_id="1716658" UNION SELECT * FROM gallery2 WHERE topic_id="548939" UNION SELECT * FROM gallery2 WHERE topic_id="906092" UNION SELECT * FROM gallery2 WHERE topic_id="1813184" UNION SELECT * FROM gallery2 WHERE topic_id="1788779" UNION SELECT * FROM gallery2 WHERE topic_id="531527" UNION SELECT * FROM gallery2 WHERE topic_id="1468080" UNION SELECT * FROM gallery2 WHERE topic_id="1110157" UNION SELECT * FROM gallery2 WHERE topic_id="23367" UNION SELECT * FROM gallery2 WHERE topic_id="192899" UNION SELECT * FROM gallery2 WHERE topic_id="195570" UNION SELECT * FROM gallery2 WHERE topic_id="1803616" UNION SELECT * FROM gallery2 WHERE topic_id="607690" UNION SELECT * FROM gallery2 WHERE topic_id="211573" UNION SELECT * FROM gallery2 WHERE topic_id="993865"