Vazba
SQL vazba z tabulky DCUTEST na tabulku DCUPOH
select *
from DCUTEST dcutest
left outer join DCUPOH dcupoh on dcupoh.idpk = dcutest.idpk_dcupoh
select *
from DCUTEST dcutest
left outer join DCUPOH dcupoh on dcupoh.idpk = dcutest.idpk_dcupoh