What do you mean by CDB and PDB in Oracle 12c?
ORACLE 12c created the change in the architecture of the ORACLE database. In this version came with the concept of the Container Database (CDB) and the Pluggable Database (PDB)
- Container Database (CDB) :- Container database contains the Oracle Metadata.This database includes control files, data files, temp files, etc. and this includes the data dictionary for those objects which are owned by the root container.
- Pluggable Database (PDB):- Pluggable Database contains the data files and temp files to handle PDB's objects only, and this includes the data dictionary for those objects which are in PDB only.
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