Important tables:?

Short answer: Customers: Contains customer details (name, address, etc.). Orders: Contains order details and references customers. Order_Items: A join table between Orders and Products. Products: Product details (name, description, price, etc.). Inventory: Tracks stock levels.

Real-world example (ShopNest)

ShopNest’s SQL Server database stores customers, products, and orders. Good indexes and clear foreign keys keep checkout queries fast and safe.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.