4. Create the Order_Product table as follows: • id is the primary key and its data type is serial quantity is an integer which doesn’t allow null and has a default value of O order_id and product_id are foreign keys and will be set to null on delete.

Computer Networking: A Top-Down Approach (7th Edition)
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ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
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Need help writing SQL queries for sample data base 

 

4. Create the Order_Product table as follows:
• id is the primary key and its data type is serial
• quantity is an integer which doesn't allow null and has a default value of 0
• order_id and product_id are foreign keys and will be set to null on delete.
5. Display the average price of all the products. For example, there are only three
products in the database with a price of 7, 8 and 9. Then the average price would be 8.
Transcribed Image Text:4. Create the Order_Product table as follows: • id is the primary key and its data type is serial • quantity is an integer which doesn't allow null and has a default value of 0 • order_id and product_id are foreign keys and will be set to null on delete. 5. Display the average price of all the products. For example, there are only three products in the database with a price of 7, 8 and 9. Then the average price would be 8.
Write SQL queries for the following database:
Customers
Orders
id
id
to
FOrder_Product
customer_id
name
id
email
K order_id
product_id
Products
Categories
id
|quantity
id
to
name
category_id
name
price
Transcribed Image Text:Write SQL queries for the following database: Customers Orders id id to FOrder_Product customer_id name id email K order_id product_id Products Categories id |quantity id to name category_id name price
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