What is Relational Database?
A database that stores rows in tables and links them with keys and relationships.
user 7 · 3 orders joined
A relational database stores data mainly as…
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In real work
Relational database: users and orders live in separate tables joined by user_id.
In the illustration
The needle for user_id 7 pushes through the users tray and then the orders tray; one user card and its three order cards lift out together.
Design the orders, customers and products tables for a relational database in your coding agent, with the foreign keys and the two indexes the checkout query needs.
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