...

db/StoredProcedures.sql

@@ -255,7 +255,7 @@ BEGIN
 			specializations.FacultyID	AS 'FacultyID'
 	FROM `study_groups`
 	INNER JOIN `specializations` ON specializations.ID = study_groups.SpecializationID
-	WHERE 	study_groups.Grade = Grade AND 
+	WHERE 	( Grade = 0 OR study_groups.Grade = Grade ) AND 
 			specializations.FacultyID = FacultyID
 	ORDER BY specializations.ID ASC, study_groups.Grade ASC, study_groups.GroupNum ASC;
 END //