Entity Framework Core - Knowledge Base (KB)

How to build several left join query in Entity Framework Core

Consider i have below entities:... public class Root { public long Id { get; set; } } public class School : Root { public long StudentId { get; set; } public Student Student { get; set; } public Teacher ...

Linq query with several left join generate few query

I try write query by linq on asp core 2 with Entity framework Core and all ok, query return right result, but very slowly. ...var Query1 = from demand in _prabacontext.Demand join demandspec in _prabacontext.DemandSpec on demand.Id equals ...