Question

I have a SQL question that i need to ask the experts. To be honest i dont even know how to ask it so i will do so by example.

I have my top level table called Clients
My Clients have Locations so i have a table called Locations
Each location has Contacts so i have a table called Contacts

Relationship in SQL looks like

Clients —> Locations —> Contacts.

Notice there is no direct relationship defined between Clients and Contacts.

I need to return all clients for a give Client.

How can i do this using Entity Frame work?

Answer 1

Assuming you want a LINQ to Entities query:

context.Clients.SelectMany(
    client => client.Locations.Select(
        location => location.Contacts)).Distinct().ToList();