Tree

SELECT * FROM gallery2 WHERE topic_id="1655941" UNION SELECT * FROM gallery2 WHERE topic_id="1411996" UNION SELECT * FROM gallery2 WHERE topic_id="14759" UNION SELECT * FROM gallery2 WHERE topic_id="384858" UNION SELECT * FROM gallery2 WHERE topic_id="969159" UNION SELECT * FROM gallery2 WHERE topic_id="1241544" UNION SELECT * FROM gallery2 WHERE topic_id="1337938" UNION SELECT * FROM gallery2 WHERE topic_id="1448" UNION SELECT * FROM gallery2 WHERE topic_id="1648860" UNION SELECT * FROM gallery2 WHERE topic_id="210457" UNION SELECT * FROM gallery2 WHERE topic_id="168697" UNION SELECT * FROM gallery2 WHERE topic_id="690567" UNION SELECT * FROM gallery2 WHERE topic_id="850158" UNION SELECT * FROM gallery2 WHERE topic_id="671759" UNION SELECT * FROM gallery2 WHERE topic_id="50516" UNION SELECT * FROM gallery2 WHERE topic_id="1058820"