= UseCase2001 – Assign Grade to Student

**Initiating actor:** Professor

**Other actors:** Student

**Description:**
A professor records the final grade for a student enrolled in a subject.

**Scenario:**

1. Professor logs in and selects “Enter Grades.”

2. System shows subjects the professor teaches:
{{{
SELECT sub.Id, sub.Name, st.Id AS Student_Id, st.Name, st.Surname
FROM Subject sub
JOIN Subject_Professor sp ON sp.Subject_Id = sub.Id
JOIN Student_Subject ss ON ss.Subject_Id = sub.Id
JOIN Student st ON st.Id = ss.Student_Id
WHERE sp.Professor_Id = :professor_id;
}}}

3. Professor selects a student and enters the final grade.

4. System updates the database:
{{{
UPDATE Student_Subject
SET Final_Grade = :grade, Status = 'COMPLETED'
WHERE Student_Id = :student_id AND Subject_Id = :subject_id;
}}}

5. System confirms the update and allows professor to continue for other students.