Уровень 10.7 задачника SQL
Даны таблицы:
| id | name |
|---|---|
| 1 | product-1 |
| 2 | product-2 |
| 3 | product-3 |
| id | product_id | amount | date |
|---|---|---|---|
| 1 | 3 | 3000 | 2023-01-05 |
| 2 | 1 | 1000 | 2023-03-10 |
| 3 | 3 | 3000 | 2023-05-15 |
| 4 | 1 | 1000 | 2023-06-20 |
| 5 | 2 | 2000 | 2023-07-20 |
| 6 | 1 | 1000 | 2023-09-27 |
| 7 | 3 | 3000 | 2023-08-15 |
| 8 | 2 | 2000 | 2023-09-27 |
| 9 | 2 | 2000 | 2023-09-03 |
| 10 | 1 | 1000 | 2023-10-28 |
| 11 | 3 | 3000 | 2023-10-05 |
| 12 | 2 | 2000 | 2023-11-20 |
| 13 | 1 | 1000 | 2023-12-01 |
| 14 | 1 | 1000 | 2023-11-22 |
| 15 | 3 | 300 | 2023-11-21 |
| 16 | 3 | 300 | 2023-11-22 |
| 17 | 3 | 300 | 2023-11-11 |
| 18 | 3 | 300 | 2023-10-07 |
| 19 | 3 | 300 | 2023-10-05 |
| 20 | 3 | 300 | 2023-10-05 |
| 21 | 3 | 2000 | 2023-12-10 |
| 22 | 3 | 2000 | 2023-11-17 |
| 23 | 2 | 2000 | 2023-11-27 |
| 24 | 3 | 3000 | 2023-12-04 |
| 25 | 3 | 3000 | 2023-12-03 |
| 26 | 2 | 2000 | 2023-10-10 |
| 27 | 2 | 2000 | 2023-11-30 |
| 28 | 3 | 3000 | 2023-10-31 |
| 29 | 1 | 1000 | 2023-10-31 |
| 30 | 1 | 1000 | 2023-12-11 |
| 31 | 3 | 3000 | 2023-11-12 |
| 32 | 3 | 3000 | 2023-12-06 |
| 33 | 2 | 2000 | 2023-11-05 |
| id | factor_value | sale_date |
|---|---|---|
| 1 | 7 | 2023-11-05 |
| 2 | 5 | 2023-11-10 |
| 3 | 2 | 2023-12-01 |
| 4 | 3 | 2023-12-05 |
| 5 | 3 | 2023-11-15 |
| 6 | 8 | 2023-10-31 |
| 7 | 7 | 2023-10-22 |
| 8 | 6 | 2023-10-29 |
| 9 | 6 | 2023-11-11 |
| 10 | 4 | 2023-11-13 |
| 11 | 3 | 2023-12-05 |
| 12 | 1 | 2023-12-10 |
| 13 | 2 | 2023-12-12 |
| 14 | 10 | 2023-10-10 |
| 15 | 9 | 2023-10-02 |
Решите для них следующие задачи:
Разработайте прогноз продаж на следующий месяц с учетом внешних факторов.
