What is a database view and why do we use it?

Short answer: A view is a virtual table created by querying data from one or more tables. It does not store data itself but presents it in a specific format. Use cases: Simplify complex queries: A view can encapsulate complex queries for easier reuse. Data security: Views can restrict access to certain columns or rows for users without giving them full table access.

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.