将SQL转换为CodeIgniter中的活动记录

Question

SELECT *, SUM(`Relaxation_rating` + `Food_rating`) AS Ratings
GROUP BY CODE
ORDER BY Ratings DESC
FROM destinations

如何在CodeIgniter中将此sql代码转换为CctiveRecord？

我尝试了以下方法，但没有显示任何结果。

$this->db->select("'(SELECT *, SUM(Relaxation_rating + Food_rating) FROM database GROUP BY CODE') AS Ratings", FALSE);
$this->db->get("database"); 

Answer 1

尝试：

$data = $this->db->select('*, SUM(`Relaxation_rating` + `Food_rating`) AS Ratings', false)->group_by('CODE')->order_by('Ratings', 'desc')->get('destinations')->result_array();

要么，

$this->db->select('*, SUM(`Relaxation_rating` + `Food_rating`) AS Ratings', false)->group_by('CODE')->order_by('Ratings', 'desc')->get('destinations')->result();

Answer 2

尝试像

$this->db->select('*, SUM(`Relaxation_rating` + `Food_rating`) AS Ratings');
$this->db->from('destinations');
$this->db->group_by('CODE');
$this->db->order_by('Ratings','desc');
$result = $this->db->get();