Views A MongoDB view is a read-only queryable object whose contents are defined by an aggregation pipeline on other collections or views. MongoDB does not persist the view contents to disk. A view's …

Create a view in MongoDB by applying an aggregation pipeline to a source collection, with options for collation settings.

Create and query views in MongoDB using `db.createCollection ()` or `db.createView ()` with examples and restrictions.

An on-demand materialized view is a pre-computed aggregation pipeline result that is stored on and read from disk. On-demand materialized views are typically the results of a $merge or $out stage.

Views provide easy access to the results of an aggregation without requiring the reader of the view to execute the pipeline. Views can also help keep your data secure by only giving users access to a …

Use $lookup to create a view over two collections and then run queries against the view without having to construct or maintain complex pipelines.

MongoDB Manual: how to query documents and top-level fields, perform equality match, query with query operators, and specify compound query conditions.

Modify a view in MongoDB by either dropping and recreating it or using the `collMod` command.

Manage databases and collections in MongoDB using Atlas UI, `mongosh`, or Compass, with options for creation and schema validation.

MongoDB logs events like connections, commands, and issues to help diagnose problems, monitor deployments, and tune database performance.