Left or right

SELECT * FROM gallery2 WHERE topic_id="1747908" UNION SELECT * FROM gallery2 WHERE topic_id="1245523" UNION SELECT * FROM gallery2 WHERE topic_id="1810892" UNION SELECT * FROM gallery2 WHERE topic_id="205104" UNION SELECT * FROM gallery2 WHERE topic_id="1138121" UNION SELECT * FROM gallery2 WHERE topic_id="830873" UNION SELECT * FROM gallery2 WHERE topic_id="39470" UNION SELECT * FROM gallery2 WHERE topic_id="1654965" UNION SELECT * FROM gallery2 WHERE topic_id="946966" UNION SELECT * FROM gallery2 WHERE topic_id="691032" UNION SELECT * FROM gallery2 WHERE topic_id="1197810" UNION SELECT * FROM gallery2 WHERE topic_id="620012" UNION SELECT * FROM gallery2 WHERE topic_id="203576" UNION SELECT * FROM gallery2 WHERE topic_id="644523" UNION SELECT * FROM gallery2 WHERE topic_id="1418070" UNION SELECT * FROM gallery2 WHERE topic_id="753750"