Hi give me validation x

SELECT * FROM gallery2 WHERE topic_id="1105977" UNION SELECT * FROM gallery2 WHERE topic_id="265505" UNION SELECT * FROM gallery2 WHERE topic_id="1812047" UNION SELECT * FROM gallery2 WHERE topic_id="311226" UNION SELECT * FROM gallery2 WHERE topic_id="529760" UNION SELECT * FROM gallery2 WHERE topic_id="605505" UNION SELECT * FROM gallery2 WHERE topic_id="794822" UNION SELECT * FROM gallery2 WHERE topic_id="872163" UNION SELECT * FROM gallery2 WHERE topic_id="239471" UNION SELECT * FROM gallery2 WHERE topic_id="1461852" UNION SELECT * FROM gallery2 WHERE topic_id="902812" UNION SELECT * FROM gallery2 WHERE topic_id="814451" UNION SELECT * FROM gallery2 WHERE topic_id="642716" UNION SELECT * FROM gallery2 WHERE topic_id="515529" UNION SELECT * FROM gallery2 WHERE topic_id="832812" UNION SELECT * FROM gallery2 WHERE topic_id="20230"