Vazba
SQL vazba z tabulky PVF_OPR na tabulku PID_HL
select *
from PVF_OPR pvf_opr
left outer join PID_HL pid_hl on pid_hl.idpk = pvf_opr.idpk_pidhl
select *
from PVF_OPR pvf_opr
left outer join PID_HL pid_hl on pid_hl.idpk = pvf_opr.idpk_pidhl