Vazba
SQL vazba z tabulky PBUC na tabulku O1CISELN
select *
from PBUC pbuc
left outer join O1CISELN o1ciseln on o1ciseln.ciselnik = pbuc.mena_cis and o1ciseln.klic1 = pbuc.mena_klic
select *
from PBUC pbuc
left outer join O1CISELN o1ciseln on o1ciseln.ciselnik = pbuc.mena_cis and o1ciseln.klic1 = pbuc.mena_klic