Well…First of all, your command will work, if you connect to the CDB root. It
will create a new CDB, with just the one PDB (rcat) in it.
If you don’t want a new CDB, but just move/copy the PDB into the same/another
existing CDB, then you should use a clone operation. Safe harbor, NDA aside and
so on, the word is that it will be possible to do do a hot clone in 12.2.
Vit