codeigniter active record nested query

Question

I\'m having a problem converting below MySQL code to a Codeigniter active record query.

SELECT sss.*, c.country_name, c.country_code 
  FROM ( SELECT gr.* 
             


        

Answer 1

you just need to check the Codeigniter Documentation

     $this->db->select('sss.*, c.country_name, c.country_code ');
       $this->db->from('(SELECT gr.* 
       FROM (`be_goldrate` as `gr`) 
      WHERE `gr`.`country_id` != 0 
        AND `gr`.`rate_type` = "calculated" 
       ORDER BY gr.date DESC) as sss');
       $this->db->join('be_countries as c','c.country_id = sss.country_id','left');

       $this->db->group_by('sss.country_id'); 

please report if any error