Put simply, views are virtual-only and run the query definition when they’re accessed. Here’s an example of when you should use SQL views.

This article explores the internals of materialized views and demonstrates how to precompute complex aggregates—having Oracle dynamically rewrite SQL to reference precomputed aggregate information.

Materialized views allow subsecond response times by precomputing aggregate information, and Oracle9 i dynamically rewrites SQL queries to reference existing materialized views.

That AWS ETL service allows programmers to write a little bit of SQL code to have a materialized view that can move from one source data store to another.