Niveau 6.3 SQL takenboek
Gegeven tabellen:
| id | name | category_id | price |
|---|---|---|---|
| 1 | product-1 | 1 | 600 |
| 2 | product-2 | 1 | 700 |
| 3 | product-3 | 1 | 800 |
| 4 | product-4 | 2 | 500 |
| 5 | product-5 | 2 | 900 |
| 6 | product-6 | 3 | 1200 |
| id | product_id | order_id | quantity | price_per_unit |
|---|---|---|---|---|
| 1 | 2 | 1 | 150 | 2 |
| 2 | 1 | 2 | 111 | 4 |
| 3 | 1 | 3 | 31 | 6 |
| 4 | 3 | 4 | 3100 | 5 |
| 5 | 4 | 5 | 30 | 160 |
| 6 | 5 | 6 | 150 | 19 |
| 7 | 1 | 7 | 320 | 60 |
Los de volgende taken op:
Vind producten die nog nooit zijn besteld.
Bepaal welk product in de grootste hoeveelheid is besteld.
