select 
                  `articles`.`artikul` as `article`
                 ,`articles`.`weight` as `weight` 
                 ,`articles`.`width` as `width` 
                 ,(
                    select SUM(`quantity`) 
                    from `rolls` 
                    where `rolls`.`artikul_id`=`articles`.`id`` 
                  ) as `quantity`
            from `articles`