Entity Framework 6: is there a way to iterate through a table without holding each row in memory

Question

I would like to be able to iterate through every row in an entity table without holding every row in memory. This is a read only operation and every row can be discarded aft

Answer 1

Based on your last comment, I'm still confused. Take a look at both of below code.

EF

using (var ctx = new AppContext())
{
    foreach (var order in ctx.Orders)
    {
        Console.WriteLine(order.Date);
    }
}

Data Reader

var constr = ConfigurationManager.ConnectionStrings["AppContext"].ConnectionString;
using (var con = new SqlConnection(constr))
{
    con.Open();    
    var cmd = new SqlCommand("select * from dbo.Orders", con);
    var reader = cmd.ExecuteReader();
    while (reader.Read())
    {
        Console.WriteLine(reader["Date"]);
    }
}

Even though EF has few initial query, both of them execute similar query that can be seen from profiler..