Stationery store entity-relationship diagram modeling customer transactions, product inventory, and supplier relationships through normalized tables. CUSTOMER, INVOICE, and EMPLOYEE entities capture sales transactions, while PRODUCT and SUPPLIER entities manage inventory and sourcing via junction tables INVOICE_PRODUCT and PRODUCT_SUPPLIER. This schema enforces referential integrity and eliminates data redundancy, enabling efficient querying of sales history, stock levels, and supplier performance. Fork and customize this diagram on Diagrams.so to adapt it for your retail database schema or extend it with additional entities like categories or discounts. The crow-foot notation clearly shows one-to-many relationships, making it ideal for SQL implementation or documentation.