Tight

SELECT * FROM gallery2 WHERE topic_id="1798951" UNION SELECT * FROM gallery2 WHERE topic_id="583564" UNION SELECT * FROM gallery2 WHERE topic_id="1369459" UNION SELECT * FROM gallery2 WHERE topic_id="1479124" UNION SELECT * FROM gallery2 WHERE topic_id="457933" UNION SELECT * FROM gallery2 WHERE topic_id="870868" UNION SELECT * FROM gallery2 WHERE topic_id="1414358" UNION SELECT * FROM gallery2 WHERE topic_id="734554" UNION SELECT * FROM gallery2 WHERE topic_id="92393" UNION SELECT * FROM gallery2 WHERE topic_id="180294" UNION SELECT * FROM gallery2 WHERE topic_id="1797477" UNION SELECT * FROM gallery2 WHERE topic_id="1019883" UNION SELECT * FROM gallery2 WHERE topic_id="929784" UNION SELECT * FROM gallery2 WHERE topic_id="917524" UNION SELECT * FROM gallery2 WHERE topic_id="56423" UNION SELECT * FROM gallery2 WHERE topic_id="536623"