public function PrimaryKeyRange($Table) {
      $Model = $this->CreateModel($Table);
      
      $Data = $this->SQL
         ->Select($Model->PrimaryKey, 'min', 'MinValue')
         ->Select($Model->PrimaryKey, 'max', 'MaxValue')
         ->From($Table)
         ->Get()->FirstRow(DATASET_TYPE_ARRAY);
      
      if ($Data)
         return array($Data['MinValue'], $Data['MaxValue']);
      else
         return array(0, 0);
   }