= UseCase2001 – Assign Grade to Student

**Initiating actor:** Professor

**Other actors:** None

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

**Scenario:**

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

2. System shows students and subjects that this specific professor teaches:
{{{
SELECT sub.Id AS Subject_Id, sub.Name AS Subject_Name, st.Id AS Student_Id, st.Name, st.Surname
FROM Student_Subject ss
JOIN Subject sub ON ss.Subject_Id = sub.Id
JOIN Student st ON ss.Student_Id = st.Id
WHERE ss.Professor_Id = :professor_id;
}}}

3. Professor selects a student/subject entry and enters the final grade.

4. System updates the database with the grade and changes status to 'PASSED' (or 'FAILED' depending on the grade):
{{{
UPDATE Student_Subject
SET Final_Grade = :grade, Status = 'PASSED'
WHERE Student_Id = :student_id AND Subject_Id = :subject_id AND Professor_Id = :professor_id;
}}}

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