获取数据库中的最后一行

Question

在CodeIgniter中检索最后一行(按id排序desc)的正确方法是什么？我试过select_max但我想要整排.

function getLastPagination(){
    $data = array();
    $this->db->query("SELECT id,sort FROM pagination GROUP BY id DESC LIMIT 1");
    $query = $this->db->get('pagination');
    $data = $query->row_array();
    return $data;
}


$data['allpag'] = $this->Model_cats->getLastPagination();
$data['pagin'] = $data['allpag']['sort'];
$per_page = $data['pagin'];  

这里我得到第一个值,但我想要最后一行.

Answer 1

$this->db->select('id')->order_by('id','desc')->limit(1)->get('table_name')->row('id');

Answer 2

试试这个.............

function getLastPagination(){

     $query ="select * from pagination order by id DESC limit 1";

     $res = $this->db->query($query);

     if($res->num_rows() > 0) {
            return $res->result("array");
    }
    return array();
    }
}

在控制器功能中你需要做以下事情.......

$allpag = $this->Model_cats->getLastPagination();
$per_page = $allpag[0]['sort'];