Vazba
SQL vazba z tabulky PSPLATKPOL na tabulku PBUC
select *
from PSPLATKPOL psplatkpol
left outer join PBUC pbuc on pbuc.idpk = psplatkpol.idpk_bu
select *
from PSPLATKPOL psplatkpol
left outer join PBUC pbuc on pbuc.idpk = psplatkpol.idpk_bu