Use this simple infographic to help.
called Oracle Multitenant that enables to do just that.
It offers simplified consolidation that requires no changesOracle Database 12c offers a new option to your applications.
In this new architecture, a multitenant container database can hold many pluggable databases. An administrator deals with the multitenant container database, but application code connects to one pluggable database.
See how the benefits of Oracle Multitenant stack up against current database architecture.