SQLGlobal::groupBy PHP Метод

    public function groupBy($groupBy)
    {
        if (!$this->validateParamater($groupBy)) {
            return $this;
        } elseif (is_array($groupBy)) {
            $this->groupBy = array_merge($this->groupBy, $groupBy);
        } elseif (func_num_args() > 1) {
            $this->groupBy = array_merge($this->groupBy, func_get_args());
        } else {
            $this->groupBy[] = $groupBy;
        }
        return $this;
    }