Elegant

SELECT * FROM gallery2 WHERE topic_id="642154" UNION SELECT * FROM gallery2 WHERE topic_id="1551619" UNION SELECT * FROM gallery2 WHERE topic_id="481718" UNION SELECT * FROM gallery2 WHERE topic_id="1603681" UNION SELECT * FROM gallery2 WHERE topic_id="976165" UNION SELECT * FROM gallery2 WHERE topic_id="788904" UNION SELECT * FROM gallery2 WHERE topic_id="616232" UNION SELECT * FROM gallery2 WHERE topic_id="599359" UNION SELECT * FROM gallery2 WHERE topic_id="262495" UNION SELECT * FROM gallery2 WHERE topic_id="1056588" UNION SELECT * FROM gallery2 WHERE topic_id="585953" UNION SELECT * FROM gallery2 WHERE topic_id="1189972" UNION SELECT * FROM gallery2 WHERE topic_id="430217" UNION SELECT * FROM gallery2 WHERE topic_id="1083126" UNION SELECT * FROM gallery2 WHERE topic_id="905836" UNION SELECT * FROM gallery2 WHERE topic_id="186526"