Additional SQL Server features and topics not covered by specific categories
HI anonymous user-4239,
EDMX is Visual Studio's "container" for the metadata about your Entity Data Model.
An .edmx file is an XML file that defines the following:
- a conceptual model
- a storage model,
- the mapping between these models.
The EDMX visual designer has a options available from its right-click context menu: "update model from database", and also "Generate database from model".
It is done based on a storage model.
MS official documentation: Entity Data Model for Data Services Packaging Format