https://www.enterspeed.com/insights/federated-database-what-it-is-and-when-to-use-it
Federated database – what it is and when to use it | Enterspeed
A federated database lets you query several databases as one, without merging the data. Here's how it works, and when it beats a warehouse.
what it isfederated databaseuse
https://www.mongodb.com/ko-kr/docs/api/doc/atlas-admin-api-v2/2024-10-23/operation/operation-creategroupdatafederation
Create One Federated Database Instance in One Project | Atlas Admin API v2 documentation...
Creates one federated database instance in the specified project.
create onefederated databaseinstance inproject atlasadmin api