Kiwango cha 9.3 cha Kitabu cha Mazoezi ya SQL
Tabifa zilizopewa:
| id | name |
|---|---|
| 1 | John |
| 2 | Max |
| 3 | Erick |
| id | user_id_1 | user_id_2 | connection_strength |
|---|---|---|---|
| 1 | 1 | 2 | 1 |
| 2 | 2 | 3 | 2 |
| 3 | 1 | 3 | 3 |
| 4 | 1 | 2 | 1 |
| 5 | 1 | 2 | 1 |
| 6 | 3 | 1 | 2 |
| 7 | 1 | 2 | 1 |
| 8 | 2 | 1 | 3 |
Tatua matatizo yafuatayo kwa ajili yao:
Задание 1
Tafuta triplet ya watumiaji (A, B, C), ambapo A amehusishwa na B, B amehusishwa na C, lakini A na C hawajaunganishwa moja kwa moja.