Vazba
SQL vazba z tabulky PVF_OPR na tabulku PVF_HL
select *
from PVF_OPR pvf_opr
left outer join PVF_HL pvf_hl on pvf_hl.idpk = pvf_opr.idpk_pvf
select *
from PVF_OPR pvf_opr
left outer join PVF_HL pvf_hl on pvf_hl.idpk = pvf_opr.idpk_pvf