Vazba
SQL vazba z tabulky PLKALVAZ na tabulku PPF_HL
select *
from PLKALVAZ plkalvaz
left outer join PPF_HL ppf_hl on ppf_hl.idpk = plkalvaz.idpk_pf
select *
from PLKALVAZ plkalvaz
left outer join PPF_HL ppf_hl on ppf_hl.idpk = plkalvaz.idpk_pf