Question

Hi
How can I write the following sql query by linq

Select * From Employee where EmployeeId not in (Select EmployeeId in orders)

Answer 1

You can try either this:

var query = from e in context.Employees
            let ids = context.Orders.Select(o => o.Employee.Id)
            where !ids.Contains(e.Id)
            select e;

or this:

var query = from e in context.Employees
            where !context.Orders.Any(o => o.Empolyee.Id == e.Id)
            select e;