sql查询去按id除重复的数据

                $m_user = M('User');
                // 通用查询条件
                //  $cond['is_deleted'] = '0';
                $user_list = $m_user
                ->table('lb_user')
                ->join("LEFT JOIN lb_money ON lb_user.openid = lb_money.openid")
                ->field('lb_user.*,SUM(lb_money.moneys) as moneys')
                ->order('id desc')
                ->page($page, $pagesize)
                ->group('id')
                ->select();
                //echo $m_user->getLastSQL();