private function buildFrom()
	{
		$froms = [];

		foreach ($this->from as $from)
		{
			$string = $this->connection->quoteName($from['table']);

			// See if we're including an alias
			if (isset($from['as']))
			{
				$string .= ' AS ' . $this->connection->quoteName($from['as']);
			}

			$froms[] = $string;
		}

		return 'FROM ' . implode(',', $froms);
	}