Can’t compare

SELECT * FROM gallery2 WHERE topic_id="227728" UNION SELECT * FROM gallery2 WHERE topic_id="244259" UNION SELECT * FROM gallery2 WHERE topic_id="635349" UNION SELECT * FROM gallery2 WHERE topic_id="1372439" UNION SELECT * FROM gallery2 WHERE topic_id="309599" UNION SELECT * FROM gallery2 WHERE topic_id="154251" UNION SELECT * FROM gallery2 WHERE topic_id="1703241" UNION SELECT * FROM gallery2 WHERE topic_id="1191298" UNION SELECT * FROM gallery2 WHERE topic_id="1728602" UNION SELECT * FROM gallery2 WHERE topic_id="1229514" UNION SELECT * FROM gallery2 WHERE topic_id="828274" UNION SELECT * FROM gallery2 WHERE topic_id="1451015" UNION SELECT * FROM gallery2 WHERE topic_id="208846" UNION SELECT * FROM gallery2 WHERE topic_id="1174887" UNION SELECT * FROM gallery2 WHERE topic_id="1768524" UNION SELECT * FROM gallery2 WHERE topic_id="1773182"