I'd need a MySQL query that moves a node and all its children within a nested set. I found [this](http://archives.postgresql.org//pgsql-sql/2002-11/msg00358.php) site, but that function just seems so illogical - there's no `universeid` or `treeid` in a nested set model, and the code itself is just longer than what feels required. The only extra column I've got in the table is `parent`.

I couldn't just remove and add the node again since it will loose its ID.