Uses of .edmx

Just right click on *.edmx file and select "Update Model From Database". Then it opens popup for what do you want to update table or view or procedure etc. Follow the below link:

 

http://blog.jongallant.com/2012/08/entity-framework-manual-update.html 

 

https://msdn.microsoft.com/library/cc716697(v=vs.100).aspx