mysql - 使用 Codeigniter 活动记录重写 MySQL 查询

Question

我不久前开始使用 CodeIgniter。有人能告诉我如何重写这个查询吗

SELECT question.timestamp AS question_time, reply.timestamp AS reply_time, 
(SELECT DATEDIFF(reply_time, question_time)) AS time_used_to_reply 
FROM question JOIN reply ON question.id = reply.question_id WHERE question.company_id=someid

使用活动记录

此外，任何快速理解 activerecord 的教程都将不胜感激。谢谢

Answer 1

经过多次研究，我最终编写了自己的活动记录脚本。

$this->db->select(array('DATEDIFF(reply.timestamp, question.timestamp)'))
    ->from('question')
    ->join('reply', 'question.id = reply.question_id')
    ->where('question.company_id', $company_id);

谢谢