Question

我特别擅长CodeIgniter和Active Record

如何获取返回行的数量并获得两个返回表行数的SUM。

我已经有了像这样的行计数的功能

控制器

 function newsletter (){    
        $data = array();
        $data['subscriber_count'] =$this->mod_contactus->count_subscriber();
        $data['user_count'] =$this->mod_contactus->count_reg_users();
        $this->load->view('admin/admin_newsletter',$data);
    }

模型

 public function count_subscriber() {
       return $this->db->get("tbl_subscribers")->num_rows();
    }   


    public function count_reg_users() {
        return $this->db->get("tbl_customer_registration")->num_rows();
    }

Answer 1

这不是什么大问题。你可以做这样的事情。协助PHP array_sum。这是php manual to array sum您已经拥有行数

控制器中的

function newsletter (){    
    $data = array();
    $data['subscriber_count'] =$this->mod_contactus->count_subscriber();
    $data['user_count'] =$this->mod_contactus->count_reg_users();
    $data['count_both'] =  array_sum($data);
    $this->load->view('admin/admin_newsletter',$data);    
}

在您的视图中echo $count_both ;

Answer 2

如果这真的是你唯一的目标，那就执行一个查询：

$query = $this->db->query("
    select 
    ( select count(*) from table_1 ) +
    ( select count(*) from table_2 ) 
    as total_num_row
    from table_1
");

# $query->num_rows()

CodeIgniter Active Record - 获取返回的行数并获得总和

2 个答案: