Entity-relationship diagram modeling a three-table schema for product catalogs, customer journeys (orders), and payment transactions. Produto (Product) connects one-to-many with Jornada (Order Journey) via id_produto foreign key, while Jornada connects one-to-many with Pagamento (Payment) via id_jornada foreign key. This normalized structure enforces referential integrity, supports multiple payments per order, and tracks order lifecycle with status enums and timestamps. Fork this diagram on Diagrams.so to customize field names, add indexes, or extend with customer and shipping tables for your specific e-commerce platform.