A mongo database can have multiple collection or tables. Data from multiple tables can be joined together and then just what the user asks for is returned. We a

A mongo database can have multiple collection or tables. Data from multiple tables can be joined together and then just what the user asks for is returned. We also include fields that calculate values based on data from the database. The caller need not be aware of the layout or structure of the data in the database. GraphQL queries allow for just the requested data to be returned and not a complete record from a database.