SQL Taskbook Level 4.10
Given a table:
| id | name | category_id | manufacturer_id | price | weight | rating |
| 1 | product-1 | 1 | 2 | 100 | 1.5 | 5 |
| 2 | product-2 | 2 | 3 | 200 | 1.7 | 4.3 |
| 3 | product-3 | 2 | 3 | 150 | 0.8 | 2.2 |
| 4 | product-4 | 3 | 3 | 500 | 0.9 | 3.3 |
| 5 | product-5 | 3 | 2 | 750 | 1.0 | 4.9 |
| 6 | product-6 | 1 | 5 | 800 | 0.5 | 3.9 |
| 7 | product-7 | 1 | 5 | 900 | 10 | 4.0 |
| 8 | product-8 | 1 | 2 | 175 | 12 | 3.5 |
| 9 | product-9 | 2 | 1 | 245 | 5 | 4.2 |
| 10 | product-10 | 1 | 2 | 260 | 4 | 4.1 |
Solve the following tasks for it:
Задание 1
Write a query that groups products into categories and calculates the average package weight for each category. The average package weight should be no greater than 0.7.
Задание 2
Write a query that groups products by manufacturer and calculates the average price for each manufacturer. The average price must be greater than 200.
Задание 3
Find the total cost of all products in each category and print the result. The cost of all products must be less than 250.
Задание 4
Write a query that groups products by manufacturer and finds the maximum product rating for each manufacturer. The maximum rating should be at least 4.