select c.id_uzivatele,c.datum,u.login,u.avatar,c.nastaveni,c.stav from sudokuliga.team_clen as c left join sudokuliga.uzivatele as u on(c.id_uzivatele=u.id_uzivatele) where c.id_team = '56' order by c.stav desc Debugging errno: 1054 Debugging error: Unknown column 'c.datum' in 'field list'