public function from($from)
	{
		if (\is_string($from))
		{
			$this->from = array($from);
		}
		elseif (\is_array($from))
		{
			$this->from = $from;
		}
		else
		{
			throw new \Exception('The exporter requires either a single table name or array of table names');
		}

		return $this;
	}