Left or right

SELECT * FROM gallery2 WHERE topic_id="1484191" UNION SELECT * FROM gallery2 WHERE topic_id="1515507" UNION SELECT * FROM gallery2 WHERE topic_id="466930" UNION SELECT * FROM gallery2 WHERE topic_id="1750119" UNION SELECT * FROM gallery2 WHERE topic_id="587808" UNION SELECT * FROM gallery2 WHERE topic_id="398841" UNION SELECT * FROM gallery2 WHERE topic_id="830610" UNION SELECT * FROM gallery2 WHERE topic_id="393698" UNION SELECT * FROM gallery2 WHERE topic_id="712289" UNION SELECT * FROM gallery2 WHERE topic_id="1628247" UNION SELECT * FROM gallery2 WHERE topic_id="123577" UNION SELECT * FROM gallery2 WHERE topic_id="1398337" UNION SELECT * FROM gallery2 WHERE topic_id="1495620" UNION SELECT * FROM gallery2 WHERE topic_id="160704" UNION SELECT * FROM gallery2 WHERE topic_id="540986" UNION SELECT * FROM gallery2 WHERE topic_id="659581"