About This Architecture

Stationery store entity-relationship diagram modeling customer transactions, product inventory, and supplier relationships. The schema connects CUSTOMER and EMPLOYEE to INVOICE, which links to INVOICE_LINE for itemized purchases, while PRODUCT tracks stock and connects to SUPPLIER via a junction table. This normalized design eliminates data redundancy, enforces referential integrity through primary and foreign keys, and supports complex queries on sales history, inventory levels, and supplier performance. Fork and customize this diagram to adapt it for your retail business logic, add additional attributes, or export as SQL DDL scripts. The mandatory relationships (solid lines) between INVOICE and its child tables ensure every sale is properly recorded with line items and employee attribution.

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How do you design a database schema for a stationery store that tracks customers, invoices, products, employees, and suppliers?

This ER diagram shows a normalized schema with CUSTOMER and EMPLOYEE linked to INVOICE, which connects to INVOICE_LINE for itemized purchases. PRODUCT tracks inventory and connects to SUPPLIER through a PRODUCT_SUPPLIER junction table, enabling many-to-many relationships and efficient inventory management.