Nette\Database\Table\SqlBuilder::addSelect PHP Метод

    public function addSelect($columns, ...$params)
    {
        if (is_array($columns)) {
            throw new Nette\InvalidArgumentException('Select column must be a string.');
        }
        $this->select[] = $columns;
        $this->parameters['select'] = array_merge($this->parameters['select'], $params);
    }

 /**
  * Adds select clause, more calls appends to the end.
  * @param  string for example "column, MD5(column) AS column_md5"
  * @return self
  */
 public function select($columns)
 {
     $this->emptyResultSet();
     $this->sqlBuilder->addSelect($columns);
     return $this;
 }