fix

db/StoredProcedures.sql

@@ -1090,6 +1090,7 @@ BEGIN
 			study_groups.GroupNum 	AS 'GroupNum'
 	FROM `students`
 	INNER JOIN `study_groups` 			ON 	students.StudyGroupID = study_groups.ID
+	INNER JOIN `grades`					ON 	grades.ID = study_groups.GradeID
 	INNER JOIN `specializations`		ON 	study_groups.SpecializationID = specializations.ID
 	LEFT JOIN `disciplines_students` 	ON 	students.ID = disciplines_students.StudentID AND 
 											DisciplineID = disciplines_students.DisciplineID