Potential

SELECT * FROM gallery2 WHERE topic_id="811418" UNION SELECT * FROM gallery2 WHERE topic_id="747864" UNION SELECT * FROM gallery2 WHERE topic_id="931106" UNION SELECT * FROM gallery2 WHERE topic_id="765911" UNION SELECT * FROM gallery2 WHERE topic_id="1473470" UNION SELECT * FROM gallery2 WHERE topic_id="1691167" UNION SELECT * FROM gallery2 WHERE topic_id="957971" UNION SELECT * FROM gallery2 WHERE topic_id="139946" UNION SELECT * FROM gallery2 WHERE topic_id="314950" UNION SELECT * FROM gallery2 WHERE topic_id="721422" UNION SELECT * FROM gallery2 WHERE topic_id="1372026" UNION SELECT * FROM gallery2 WHERE topic_id="211676" UNION SELECT * FROM gallery2 WHERE topic_id="1229975" UNION SELECT * FROM gallery2 WHERE topic_id="1658680" UNION SELECT * FROM gallery2 WHERE topic_id="964041" UNION SELECT * FROM gallery2 WHERE topic_id="843351"