select nev from adatok where (mat, angol, "2nyelv", tesi) in (select mat, angol, "2nyelv", tesi from adatok where nev~'Bekre') and nev!=(select nev from adatok where nev~'Bekre');
select nev from adatok where (mat, angol, "2nyelv", tesi) in (select mat, angol, "2nyelv", tesi from adatok where nev~'Bekre') and not nev in (select nev from adatok where nev~'Bekre');