Map two different entities to the same table?

Question

I have a table in my database with a lot of fields. Most of the time I need all those fields. There is one scenario, however, where I only need a few of the field

Answer 1

I would create a View on the database containing only the data you need and add the View to your entity data model.

If you don't want to modify the database, you can create a Linq to entities or ESQL statement projecting to a POCO class with only the information you need.

public IQueryable GetView(DBContext context)
{
    return  (from obj in context.ComplexObjects
            select new SimpleObject() { Property1 = obj.Property1,
                                        Property1 = obj.Property2
                                      }); 
}