Niveau 9.1 SQL Takenboek
Gegeven tabellen:
| id | name |
|---|---|
| 1 | Alan |
| 2 | James |
| 3 | John |
| 4 | Kella |
| 5 | Max |
| 6 | Kevin |
| 7 | Taylor |
| 8 | Bryan |
| 9 | Jorge |
| 10 | Emile |
| id | title | author_id | date |
|---|---|---|---|
| 1 | Lorem ipsum dolor | 10 | 2023-11-25 |
| 2 | Lorem ipsum dolor sit amet | 4 | 2023-10-24 |
| 3 | Integer in quam | 7 | 2023-09-21 |
| 4 | Aliquam erat volutpat | 6 | 2023-11-11 |
| 5 | Ut tristique volutpat urna | 9 | 2023-08-31 |
| 6 | Nullam imperdiet | 3 | 2023-11-25 |
| 7 | Donec non tincidunt orci | 8 | 2023-11-20 |
| 8 | Pellentesque habitant | 2 | 2023-07-03 |
| 9 | Sed non massa | 1 | 2023-11-25 |
| 10 | Sed fermentum | 5 | 2023-10-19 |
| 11 | Sed fermentum quis massa | 9 | 2023-11-09 |
| 12 | Etiam id magna ullamcorper | 10 | 2023-02-28 |
| 13 | Aenean metus urna, imperdiet | 1 | 2023-06-30 |
| 14 | Nulla tincidunt arcu erat | 2 | 2023-07-25 |
| 15 | Sed augue urna | 8 | 2023-10-01 |
| 16 | Vivamus laoreet | 7 | 2023-07-06 |
| 17 | Maecenas ac metus | 6 | 2023-11-25 |
| 18 | Maecenas ac metus sed augue | 4 | 2023-11-25 |
| 19 | Donec mi massa, venenatis | 3 | 2023-11-25 |
| 20 | Nunc ac venenatis orci | 5 | 2023-11-25 |
| id | post_id | rating_value |
|---|---|---|
| 1 | 15 | 4.7 |
| 2 | 6 | 4.8 |
| 3 | 8 | 4.9 |
| 4 | 7 | 5.6 |
| 5 | 9 | 8.8 |
| 6 | 12 | 9.3 |
| 7 | 11 | 9.1 |
| 8 | 13 | 3.9 |
| 9 | 14 | 6.9 |
| 10 | 16 | 6.6 |
| 11 | 17 | 7.9 |
| 12 | 4 | 8.5 |
| 13 | 3 | 7.5 |
| 14 | 2 | 9.0 |
| 15 | 18 | 8.4 |
| 16 | 1 | 5.6 |
| 17 | 19 | 3.3 |
| 18 | 5 | 6.6 |
| 19 | 20 | 9.1 |
| 20 | 10 | 8.5 |
Los hiervoor de volgende taken op:
Vind de top 5 auteurs met de hoogste gemiddelde beoordeling voor hun berichten.
