Как получить данные с двух таблиц?

$db->query("
	SELECT
	a.*,
	a.id as ids,
	u.*,
	w.answer,
	w.name as user_name,
	w.time as times,
	c.name as cats,
	n.id,
	n.title,
	i.area,
	i.images,
	i.author,
	i.advice_id,
	s.descr as static_title,
	s.name as static_alias
	FROM " . PREFIX . "_advice as a
	LEFT JOIN " . PREFIX . "_users as u ON (a.autor = u.name )
	LEFT JOIN " . PREFIX . "_advice_answ as w ON (a.id = w.id)
	LEFT JOIN " . PREFIX . "_advice_images as i ON (a.id = i.advice_id )
	LEFT JOIN " . PREFIX . "_advice_cat as c ON (a.category = c.id)
	LEFT JOIN " . PREFIX . "_post as n ON (n.id = a.extend_id AND a.extend_type = 'post')
	LEFT JOIN " . PREFIX . "_static as s ON (s.id = a.extend_id AND a.extend_type = 'static')
	WHERE a.moder='{$moder}' ORDER BY a.time DESC LIMIT $start_from, $news_per_page
");