Question

ASP.NET MVC 2 + SQL Server Express…

Answer 1

The same way you would in every .NET application:

using (var connection = new SqlConnection("PUT YOUR CONNECTION STRING HERE"))
using (var command = connection.CreateCommand())
{
    connection.Open();
    command.CommandText = "SELECT id FROM table";
    using (var reader = command.ExecuteReader())
    {
        while (reader.Read())
        {
            // TODO: read the results
        }
    }
}