Consistency: The database moves from one valid state to another, maintaining?

Short answer: Consistency: The database moves from one valid state to another, maintaining? is a common interview topic in SQL & Databases. Give a clear definition, then one concrete example.

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.