Vazba
SQL vazba z tabulky PLKALVAZ na tabulku PSPLATKHL
select *
from PLKALVAZ plkalvaz
left outer join PSPLATKHL psplatkhl on psplatkhl.idpk = plkalvaz.idpk_psplatkhl
select *
from PLKALVAZ plkalvaz
left outer join PSPLATKHL psplatkhl on psplatkhl.idpk = plkalvaz.idpk_psplatkhl