Have you ever worked with views in databases?

Yes, I have worked with views in databases. A view is a virtual table that is created based on the result of an SQL query. It allows:

• To abstract complex queries and use them as regular tables.
• To restrict access to data by showing only the necessary columns or rows.
• To improve code readability and maintainability.

For example, in Node.js using the pg library for PostgreSQL, you can query a view just like a table:

const res = await client.query('SELECT * FROM my_view WHERE status = $1', ['active']);
console.log(res.rows);

Views can be simple (only SELECT) or materialized (storing the result on disk for faster reading). The appropriate type is chosen depending on the task.