SQL vazifa to'plami 8.5 Darajasi
Quyidagi jadvallar berilgan:
| id | name | date_of_birth |
|---|---|---|
| 1 | John | 2000-12-25 |
| 2 | Matthew | 1999-01-30 |
| 3 | Martin | 1998-10-20 |
| 4 | Oscar | 2000-04-30 |
| 5 | Ricola | 2000-05-31 |
| id | student_id | subject_id | grade |
|---|---|---|---|
| 1 | 4 | 1 | 9.8 |
| 2 | 3 | 1 | 6.5 |
| 3 | 5 | 1 | 7.5 |
| 4 | 1 | 1 | 7.7 |
| 5 | 2 | 1 | 8.6 |
| 6 | 5 | 2 | 6.7 |
| 7 | 4 | 2 | 9.1 |
| 8 | 3 | 2 | 9.5 |
| 9 | 2 | 2 | 8.0 |
| 10 | 1 | 2 | 5.4 |
| id | student_id | subject_id | is_done |
|---|---|---|---|
| 1 | 3 | 1 | true |
| 2 | 4 | 1 | true |
| 3 | 2 | 1 | false |
| 4 | 2 | 2 | true |
| 5 | 1 | 1 | false |
| 6 | 1 | 2 | false |
| 7 | 5 | 2 | true |
| 8 | 5 | 1 | false |
| 9 | 3 | 2 | true |
| 10 | 4 | 2 | true |
Ularni quyidagi vazifalarni yeching:
Eng yuqori o'rtacha bahoga ega bo'lgan va kamida bitta fan topshirgan talabani toping va uning ismi va o'rtacha bahosini chiqaring.
Oldingi vazifani shunday o'zgartiringki, eng past o'rtacha bahoga ega bo'lgan va kamida bitta fan topshirgan talabani topasiz va uning ismi va o'rtacha bahosini chiqarasiz.
