Yes, combobox cboOrario rowsource is
SELECT DISTINCT orariatbl.orarioID, orariatbl.Orario
FROM orariatbl, eidiyphresiontbl
GROUP BY orariatbl.orarioID, orariatbl.Orario, eidiyphresiontbl.haraktirismosypiresiasID, eidiyphresiontbl.eidosypiresiasID
HAVING (((orariatbl.orarioID) In (1,2,3,6,8)) AND...