protected function _having($key, $values=[], string $conj='AND'): self
	{
		$where = $this->_where($key, $values);

		// Create key/value placeholders
		foreach($where as $f => $val)
		{
			// Split each key by spaces, in case there
			// is an operator such as >, <, !=, etc.
			$fArray = explode(' ', trim($f));

			$item = $this->driver->quoteIdent($fArray[0]);

			// Simple key value, or an operator
			$item .= (count($fArray) === 1) ? '=?' : " {$fArray[1]} ?";

			// Put in the having map
			$this->state->appendHavingMap([
				'conjunction' => empty($this->state->getHavingMap())
					? ' HAVING '
					: " {$conj} ",
				'string' => $item
			]);
		}

		return $this;
	}