public function buildHaving()
	{
		$havings = [];

		foreach ($this->having as $having)
		{
			$havings[] = $having['column'] . ' ' . $having['operator'] . ' ?';

			$this->bind(is_string($having['value']) ? trim($having['value']) : $having['value']);
		}

		return 'HAVING ' . implode(" AND ", $havings);
	}