protected function selectandi($string) {
        $firstLetter = strtolower(substr($string, 0, 1));
        $rest = substr($string, 1);
        switch($firstLetter) {
            case '#':
                $return = 'UNIX_TIMESTAMP(' . $this->_sanitizeAndAddBackticks($this->cleanAs($rest)) . ')*1000';
                break;
            case '$':
                $return = 'HEX(' . $this->_sanitizeAndAddBackticks($this->cleanAs($rest)) . ')';
                break;
            default:
                $return = $this->addBackticks($string);
        }
        return $return . $this->checkAs($string);
    }