nullification

SELECT * FROM gallery2 WHERE topic_id="795985" UNION SELECT * FROM gallery2 WHERE topic_id="426877" UNION SELECT * FROM gallery2 WHERE topic_id="1092126" UNION SELECT * FROM gallery2 WHERE topic_id="1451275" UNION SELECT * FROM gallery2 WHERE topic_id="1558941" UNION SELECT * FROM gallery2 WHERE topic_id="1249259" UNION SELECT * FROM gallery2 WHERE topic_id="346873" UNION SELECT * FROM gallery2 WHERE topic_id="84456" UNION SELECT * FROM gallery2 WHERE topic_id="271816" UNION SELECT * FROM gallery2 WHERE topic_id="1760403" UNION SELECT * FROM gallery2 WHERE topic_id="34418" UNION SELECT * FROM gallery2 WHERE topic_id="934998" UNION SELECT * FROM gallery2 WHERE topic_id="1361309" UNION SELECT * FROM gallery2 WHERE topic_id="115482" UNION SELECT * FROM gallery2 WHERE topic_id="1403455" UNION SELECT * FROM gallery2 WHERE topic_id="137619"