Left or right

SELECT * FROM gallery2 WHERE topic_id="1492168" UNION SELECT * FROM gallery2 WHERE topic_id="1038372" UNION SELECT * FROM gallery2 WHERE topic_id="789973" UNION SELECT * FROM gallery2 WHERE topic_id="385523" UNION SELECT * FROM gallery2 WHERE topic_id="129886" UNION SELECT * FROM gallery2 WHERE topic_id="376986" UNION SELECT * FROM gallery2 WHERE topic_id="1301640" UNION SELECT * FROM gallery2 WHERE topic_id="141571" UNION SELECT * FROM gallery2 WHERE topic_id="55413" UNION SELECT * FROM gallery2 WHERE topic_id="1391294" UNION SELECT * FROM gallery2 WHERE topic_id="634751" UNION SELECT * FROM gallery2 WHERE topic_id="943075" UNION SELECT * FROM gallery2 WHERE topic_id="497330" UNION SELECT * FROM gallery2 WHERE topic_id="1821208" UNION SELECT * FROM gallery2 WHERE topic_id="1269198" UNION SELECT * FROM gallery2 WHERE topic_id="1075601"