Granada\ORM::select_many_expr PHP Method

    public function select_many_expr()
    {
        $columns = func_get_args();
        if (!empty($columns)) {
            $columns = $this->_normalise_select_many_columns($columns);
            foreach ($columns as $alias => $column) {
                if (is_numeric($alias)) {
                    $alias = null;
                }
                $this->select_expr($column, $alias);
            }
        }
        return $this;
    }