tightly packed

SELECT * FROM gallery2 WHERE topic_id="1491513" UNION SELECT * FROM gallery2 WHERE topic_id="746582" UNION SELECT * FROM gallery2 WHERE topic_id="669186" UNION SELECT * FROM gallery2 WHERE topic_id="439166" UNION SELECT * FROM gallery2 WHERE topic_id="294560" UNION SELECT * FROM gallery2 WHERE topic_id="577933" UNION SELECT * FROM gallery2 WHERE topic_id="1353215" UNION SELECT * FROM gallery2 WHERE topic_id="1424853" UNION SELECT * FROM gallery2 WHERE topic_id="471355" UNION SELECT * FROM gallery2 WHERE topic_id="632052" UNION SELECT * FROM gallery2 WHERE topic_id="1770515" UNION SELECT * FROM gallery2 WHERE topic_id="1199361" UNION SELECT * FROM gallery2 WHERE topic_id="1591477" UNION SELECT * FROM gallery2 WHERE topic_id="1289073" UNION SELECT * FROM gallery2 WHERE topic_id="1236488" UNION SELECT * FROM gallery2 WHERE topic_id="1497024"