select count(*) from objects datemodelpublic, eav_int serialno, objects model where datemodelpublic.object_id=serialno.object_id and datemodelpublic.object_class=127 and datemodelpublic.object_name=model.object_id and datemodelpublic.object_description < '20060501' and datemodelpublic.object_description > '20050431' order by datemodelpublic.object_description