Level 9.9 SQL Problem Book
Diberikan tabel:
| id | name |
|---|---|
| 1 | Germany |
| 2 | France |
| 3 | Norway |
| 4 | Guatemala |
| 5 | Sweden |
| id | name | country_id |
|---|---|---|
| 1 | Alex | 3 |
| 2 | Joe | 1 |
| 3 | Erick | 4 |
| 4 | Max | 2 |
| 5 | John | 5 |
| id | customer_id | amount | date |
|---|---|---|---|
| 1 | 3 | 2311 | 2023-12-11 |
| 2 | 3 | 1999 | 2023-12-01 |
| 3 | 3 | 1200 | 2023-11-10 |
| 4 | 3 | 2321 | 2023-11-15 |
| 5 | 3 | 3111 | 2023-12-10 |
| 6 | 2 | 3222 | 2023-12-11 |
| 7 | 2 | 4000 | 2023-10-29 |
| 8 | 2 | 2000 | 2023-10-24 |
| 9 | 2 | 1200 | 2023-10-13 |
| 10 | 1 | 500 | 2023-11-30 |
| 11 | 1 | 600 | 2023-12-10 |
| 12 | 1 | 490 | 2023-12-01 |
| 12 | 3 | 1200 | 2023-12-05 |
| 13 | 1 | 1400 | 2023-12-06 |
| 14 | 4 | 3200 | 2023-11-10 |
| 15 | 4 | 2300 | 2023-10-20 |
| 16 | 4 | 1400 | 2023-09-30 |
| 17 | 4 | 1590 | 2023-09-22 |
| 18 | 5 | 8000 | 2023-12-09 |
| 19 | 5 | 5700 | 2023-12-08 |
| 20 | 5 | 1100 | 2023-11-27 |
| 21 | 5 | 4200 | 2023-11-16 |
| 22 | 5 | 1900 | 2023-10-22 |
| 23 | 5 | 4700 | 2023-10-17 |
Selesaikan masalah berikut untuk mereka:
Temukan tiga negara yang memberikan jumlah pesanan terbanyak.
Temukan dua negara yang memberikan pesanan dengan jumlah total terbesar.
