Nette\Database\Table\Selection::max PHP Method

    public function max($column)
    {
        return $this->aggregation("MAX({$column})");
    }

 /**
  * Returns maximum value from a column.
  *
  * @param $column string
  * @return int
  */
 public function max($column)
 {
     return $this->selection->max($column);
 }