You can use Database Configuration Assistant (DBCA) to create, unplug, delete, or configure a pluggable database (PDB) in an existing multitenant container database (CDB).
To manage PDBs using DBCA:
Start DBCA as described in "Starting DBCA".
In the Manage Pluggable Databases window, select one of the PDB operations and click Next.
In the Database List window, select the CDB in which to perform the selected PDB operation and click Next.
Follow the instructions in the DBCA guided workflow for the selected PDB operation.
Oracle Database Concepts and Oracle Database Administrator's Guide for more information about CDBs and PDBs