Vazba
SQL vazba z tabulky rza na tabulku rka
select *
from rza rza
inner join rka rka on rka.rka_fi = rza.rza_fi and rka.rka_sa = rza.rza_sa and rka.rka_nr = rza.rza_rk
select *
from rza rza
inner join rka rka on rka.rka_fi = rza.rza_fi and rka.rka_sa = rza.rza_sa and rka.rka_nr = rza.rza_rk