Students
| student_id | first_name | last_name |
| 1 | Alice | Johnson |
| 2 | Bob | Smith |
| 3 | Charlie | Doe |
| 4 | David | Black |
| 5 | Eve | White |
Classes
| class_id | course_name | teacher_name |
| 1 | Math | Mr. Brown |
| 2 | English | Mrs. Green |
| 3 | History | Ms. Blue |
| 4 | Science | Dr. Red |
| 5 | Art | Prof. Yellow |
Enrollments
| enrollment_id | student_id | class_id |
| (→ Students.student_id) | (→ Classes.class_id) |
| 1 | 1 | 1 |
| 2 | 2 | 2 |
| 3 | 3 | 3 |
| 4 | 4 | 4 |
| 5 | 5 | 5 |
Attendance
| attendance_id | student_id | date_attended |
| (→ Students.student_id) | |
| 1 | 1 | 2023-01-01 10:00:00 |
| 2 | 2 | 2023-01-01 10:00:00 |
| 3 | 3 | 2023-01-02 10:00:00 |
| 4 | 4 | 2023-01-02 10:00:00 |
| 5 | 5 | 2023-01-03 10:00:00 |
Grades
| grade_id | student_id | class_id | grade |
| (→ Students.student_id) | (→ Classes.class_id) | |
| 1 | 1 | 1 | 8.5 |
| 2 | 2 | 2 | 7.5 |
| 3 | 3 | 3 | 6.5 |
| 4 | 4 | 4 | 9.5 |
| 5 | 5 | 5 | 7 |