This illustration shows a CDB with a CDB$ROOT container, a PDB$SEED container plugged into the root, and several PDBs plugged into the root. One PDB is being unplugged from the CDB. The illustration
shows two ways to unplug the PDB:
One way shows the database files and the XML metadata file of the unplugged PDB. An ALTER PLUGGABLE DATABASE ... UNPLUG INTO statement unplugs the PDB.
Another way shows the database files and the XML metadata file of the unplugged PDB in a single .PDB file. An ALTER PLUGGABLE DATABASE ... UNPLUG INTO statement unplugs the PDB.