RethinkDB's `.changes()` command doesn't support this directly. Here is the corresponding github issue: https://github.com/rethinkdb/rethinkdb/issues/3579 https

RethinkDB's `.changes()` command doesn't support this directly. Here is the corresponding github issue: https://github.com/rethinkdb/rethinkdb/issues/3579 https://github.com/rethinkdb/rethinkdb/issues/3579 The code in the demo does this by performing a separate `between` query.