Perfect

SELECT * FROM gallery2 WHERE topic_id="1548230" UNION SELECT * FROM gallery2 WHERE topic_id="1799787" UNION SELECT * FROM gallery2 WHERE topic_id="343090" UNION SELECT * FROM gallery2 WHERE topic_id="1064884" UNION SELECT * FROM gallery2 WHERE topic_id="946525" UNION SELECT * FROM gallery2 WHERE topic_id="1383951" UNION SELECT * FROM gallery2 WHERE topic_id="1022682" UNION SELECT * FROM gallery2 WHERE topic_id="1737392" UNION SELECT * FROM gallery2 WHERE topic_id="1791900" UNION SELECT * FROM gallery2 WHERE topic_id="1670689" UNION SELECT * FROM gallery2 WHERE topic_id="663452" UNION SELECT * FROM gallery2 WHERE topic_id="801946" UNION SELECT * FROM gallery2 WHERE topic_id="431310" UNION SELECT * FROM gallery2 WHERE topic_id="249598" UNION SELECT * FROM gallery2 WHERE topic_id="1447201" UNION SELECT * FROM gallery2 WHERE topic_id="23959"