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Run Queries Against Your Federated Database Instance

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  • Prerequisites
  • Queries
  • Summary

Estimated completion time: 5 minutes

You can run operations using the MongoDB Query Language (MQL) which includes most, but not all standard server commands. To learn which MQL operations are supported, see the MQL Support documentation.


The Atlas Data Federation sample datasets are read-only.

To complete this part of the tutorial, you will need to have completed:

You must be connected to your federated database instance with the MongoDB Shell before running the following queries.

Before running the queries, switch to Database0 database:

use FederatedDatabaseInstance0

The following queries use the paths that you added to your federated database instance during deployment. If you added all the paths to the sample datasets, you can run all the queries in the following tabs. If you only added some paths, click and run the queries in the appropriate tabs for the sample dataset paths that you added.

Congratulations! You just set up a federated database instance, created a database and collections from data stored in an S3 bucket, and queried the data using MQL commands.

For more information on federated database instances, see Atlas Data Federation.


When you dynamically generate collections from filenames, the number of collections is not accurately reported in the Data Federation view.

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