Nothing close enough? Start from a blank entity structure → Describe it in one paragraph.
How to use an entity structure template.
- 01Identify core business entities
List the key objects your ecommerce app needs, such as Customer, Product, Order, Cart, and Payment.
- 02Define relationships and cardinalities
Decide how entities are linked (e.g., a Customer places many Orders) and specify the relationship type (one-to-many, many-to-many).
- 03Add attributes to each entity
Assign relevant fields like SKU, price, email, order status, and payment method.
- 04Use the generator to input your schema
Enter entities and relationships using our intuitive editor or start from an existing template.
- 05Export and share your ER diagram
Download as an image or SVG, or share a live link with your team for collaboration.
Questions about entity structure templates
What entities are essential for an ecommerce database?
Common entities include User, Product, Category, Order, OrderItem, Cart, Payment, and Shipment. The exact set depends on your business model, but these form the core of most online stores.
How do I model product variations (e.g., size, color)?
Use a Product entity for the base information and a separate ProductVariant entity linked with a one-to-many relationship to handle attributes like size, color, and price differences.
Can I handle multiple selling channels in one database?
Yes, by introducing a SalesChannel entity and linking orders or listings to it. This allows you to track sales from your own website, marketplaces, or social media in one place.
How do I store historical data like completed orders?
It’s best to archive order data in a read-only table or use a soft delete flag to preserve purchase history without affecting active operations.
What is the best way to model a shopping cart in an ERD?
A Cart entity linked to User and holding CartItem entities, each referencing a Product. Make cart data temporary and allow anonymous carts by linking to a session instead of a user ID.