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What is a View in SQL?

Q: What is a View in SQL?

Short answer: A view in SQL is a virtual table that is defined by a SELECT query. It does not store data itself but rather provides a way to view and work with the results of a query as if it were a table. Views allow users to access specific, formatted data without modifying the underlying tables directly. Purpose: Simplify complex queries, abstract the database schema, and improve security by exposing only the necessary data. Example code CREATE VIEW employee_view AS SELECT id, name, department FROM employees; You can then query the view like a regular table: SELECT * FROM employee_view; 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 Define — one clear sentence (the short answer above). Example — relate it to a project like ShopNest or your real work. Trade-off — when you would not use it.

Short answer: A view in SQL is a virtual table that is defined by a SELECT query. It does not store data itself but rather provides a way to view and work with the results of a query as if it were a table. Views allow users to access specific, formatted data without modifying the underlying tables directly. Purpose: Simplify complex queries, abstract the database schema, and improve security by exposing only the necessary data.

Example code

CREATE VIEW employee_view AS SELECT id, name, department FROM employees; You can then query the view like a regular table: SELECT * FROM employee_view;

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

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

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