Add Online Shop database schema

[TrickyTenshi]

No description provided.

[mateacademy-ai-mentor]

Review Summary

Your solution is approved because it fully meets the functional and technical requirements of the task. The script correctly creates the ShopDB database and defines all four required tables (Products, Customers, Orders, OrderItems) with the specified columns and the allowed data types (INT, DATE, VARCHAR(50), VARCHAR(100)). All ID fields are defined as INT AUTO_INCREMENT primary keys, and the foreign key relationships with ON DELETE SET NULL between Orders → Customers, OrderItems → Orders, and OrderItems → Products are set up correctly, so referential behavior matches the specification. There are no critical blockers or missing features relative to the task description. As minor, non-blocking improvements for real-world scenarios, you could consider using a monetary type such as DECIMAL for Price and adding NOT NULL constraints on required fields to improve data integrity. Overall, well done implementing the schema precisely as requested.

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