I'd probably recommend using Replication to accomplish this but if for some
reason that's not an option, configure a SqlDataAdapter object to point to
big Sql and fill a datatable/dataset from it. Set the
AcceptChangesDuringFill property to false. Then, configure one pointing to
SqlCe and call its update method passing in the same exact datatable.
however this is a hack in most cases - use replication if you can.