Types of Databases in 12c

Types of Databases in 12c 

1.Container Database (CDB): The primary database that contains multiple plugged-in databases. Many operations can be performed at the container level to reduce management costs. A database is created as either a CDB or a non-CDB.

2.Pluggable Database (PDB): A set of schemas, objects, and non-schema objects that can be plugged and unplugged from a container database. The PDB appears to OracleNet and end users as a database in and of itself but is actually managed within a container that may have many PDBs.

3.Seed Database (Seed PDB): A default PDB that the system uses as a template to quickly provision other user-created PDBs. Internally, it’s called PDB$SEED.