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我似乎无法将 Wilson Score Confidence SQL 代码转换为 Codeigniter 活动记录代码。这是威尔逊分数置信度的普通 SQL：

SELECT *, ((likes+ 1.9208) / (likes + dislikes) - 
                   1.96 * SQRT((likes * dislikes) / (likes + dislikes) + 0.9604) / 
                          (likes + dislikes)) / (1 + 3.8416 / (likes + dislikes)) 
       AS ci_lower_bound FROM widgets WHERE likes + dislikes > 0 
       ORDER BY ci_lower_bound DESC;

这取自：http ://www.evanmiller.org/how-not-to-sort-by-average-rating.html

这是我尝试的翻译，但似乎没有用：

        $this->db->select('*, ((likes + 1.9208) / (likes + dislikes) - 1.96 * SQRT((likes * dislikes) / (likes + dislikes) + 0.9604) / (likes + dislikes)) / (1 + 3.8416 / (likes + dislikes)) AS ci_lower_bound');
        $this->db->where('likes + dislikes >', 0);
        $this->db->order_by("ci_lower_bound", "desc");
        $query = $this->db->get('posts', $config['per_page'], $this->uri->segment(1)); 
        $data['results'] = $query->result();

结果总是以空的形式结束。

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2 回答 2

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1.the table name has not been specified in code "widgets"
try:
        $this->db->from('widgets');
于 2013-06-13T12:14:48.113 回答
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嗯......原来我的代码毕竟是正确的。MySQL 出现了一些小故障：

$this->db->select('*, ((likes + 1.9208) / (likes + dislikes) - 1.96 * SQRT((likes * dislikes) / (likes + dislikes) + 0.9604) / (likes + dislikes)) / (1 + 3.8416 / (likes + dislikes)) AS ci_lower_bound');
$this->db->where('likes + dislikes >', 0);
$this->db->order_by("ci_lower_bound", "desc");
$query = $this->db->get('posts', $config['per_page'], $this->uri->segment(1)); 
$data['results'] = $query->result();
于 2013-06-13T12:18:05.843 回答