I hope this is what you are looking for

SELECT * FROM gallery2 WHERE topic_id="696459" UNION SELECT * FROM gallery2 WHERE topic_id="866325" UNION SELECT * FROM gallery2 WHERE topic_id="1811025" UNION SELECT * FROM gallery2 WHERE topic_id="1050189" UNION SELECT * FROM gallery2 WHERE topic_id="565056" UNION SELECT * FROM gallery2 WHERE topic_id="1174963" UNION SELECT * FROM gallery2 WHERE topic_id="1767351" UNION SELECT * FROM gallery2 WHERE topic_id="1132608" UNION SELECT * FROM gallery2 WHERE topic_id="760441" UNION SELECT * FROM gallery2 WHERE topic_id="898116" UNION SELECT * FROM gallery2 WHERE topic_id="844915" UNION SELECT * FROM gallery2 WHERE topic_id="855602" UNION SELECT * FROM gallery2 WHERE topic_id="727564" UNION SELECT * FROM gallery2 WHERE topic_id="1353430" UNION SELECT * FROM gallery2 WHERE topic_id="500839" UNION SELECT * FROM gallery2 WHERE topic_id="279330"