Niveau 9.10 van SQL takenboek
Gegeven tabellen:
| id | name |
|---|---|
| 1 | Admin |
| 2 | Fabiano |
| 3 | Johnson |
| 4 | Erich |
| 5 | Isabella |
| id | title | user_id | published_at |
|---|---|---|---|
| 1 | Lorem ipsum | 1 | 2023-11-27 |
| 2 | Lorem ipsum dolor sit amet | 1 | 2023-11-30 |
| 3 | Lorem ipsum dolor sit | 1 | 2023-10-11 |
| 4 | Lorem ipsum dolor | 1 | 2023-11-16 |
| id | body | user_id | post_id | published_at |
|---|---|---|---|---|
| 1 | Great! | 4 | 1 | 2023-12-01 |
| 2 | Excellent! | 4 | 1 | 2023-12-01 |
| 3 | Interesting... | 4 | 4 | 2023-12-11 |
| 4 | Cool. | 4 | 4 | 2023-12-10 |
| 5 | Hm... | 5 | 3 | 2023-12-02 |
| 6 | Exciting. | 5 | 3 | 2023-12-05 |
| 7 | Fairly... | 5 | 3 | 2023-12-10 |
| 8 | Excellent. | 5 | 2 | 2023-12-01 |
| 9 | Awesome. | 5 | 2 | 2023-12-01 |
| 10 | So cool!!! | 3 | 2 | 2023-12-02 |
| 11 | Exciting. | 3 | 2 | 2023-12-03 |
| 12 | Normal | 3 | 3 | 2023-12-05 |
| 13 | Good! | 3 | 3 | 2023-12-10 |
| 14 | Nonsense!!! | 3 | 1 | 2023-12-11 |
| 15 | Awful! | 3 | 1 | 2023-12-09 |
| 16 | Great! | 2 | 4 | 2023-12-01 |
| 17 | Like. | 2 | 4 | 2023-12-05 |
| 18 | Share! | 2 | 2 | 2023-12-06 |
| 19 | Good. | 2 | 1 | 2023-12-11 |
| 20 | Great! | 2 | 1 | 2023-12-07 |
| 21 | Awesome... | 2 | 1 | 2023-12-09 |
| 22 | Fairly... | 2 | 4 | 2023-12-07 |
| 23 | Awesome!!! | 2 | 4 | 2023-12-02 |
Los de volgende problemen voor hen op:
Vind de gebruiker die de grootste hoeveelheid commentaren onder verschillende posts heeft achtergelaten.
