DBA_PDBS describes PDBs belonging to a given CDB. When queried from the root, it will describe all PDBs belonging to a given CDB. When queried from a PDB, it will always return no rows.
Container ID of the PDB
Name of the PDB
PDB identifier calculated when the PDB is created and stored in all file headers associated with the PDB
Unique identifier associated with the container
Globally unique immutable ID assigned to the PDB at creation time
State of the PDB. Possible values:
NEW - The PDB has never been opened since it was created. It must be opened in READ WRITE mode for Oracle to perform processing needed to complete the integration of the PDB into the CDB and mark it NORMAL. An error will be thrown if an attempt is made to open the PDB read only.
NORMAL - The PDB is ready to be used.
UNPLUGGED - The PDB has been unplugged. The only operation that can be performed on it is DROP PLUGGABLE DATABASE.
NEEDS UPGRADE - A PDB needs to be upgraded to the version of the CDB into which it was plugged.
CONVERTING - A non-CDB was plugged into the CDB and is undergoing conversion required to make it behave like a real PDB.
UNUSABLE - The PDB is being created or an unrecoverable error was encountered during its creation. The PDB cannot be opened while its state is set to UNUSABLE. If the PDB remains in this state because of an error encountered during its creation, it can only be dropped. The alert log can be checked to determine if there was an error during PDB creation.