The Database-to-Remote Schema Joins feature enables you to connect the data from your existing database with an external GraphQL service.

With GraphQL Joins, you can federate your queries and mutations across multiple GraphQL services as if they were a single GraphQL schema. You do not have to write extra code or change the underlying APIs.

Remote Schema to Database allows you to join the data coming from the GraphQL API with the existing data from the database.

In this post, we will look at how the dataloader pattern is used for GraphQL Joins which has performance implications.