Oracle Database 12c Architecture (part-1)
*Let us we discuss oracle 12c architecture and explanation before you must have the knowledge on Oracle 11g architecture if you have good knowledge on the oracle 11g architecture it's easy to understand 12c
*Before that 12c Multiple databases reside on single server and single database contains multiple schemas apart from RAC each Oracle database had single instance, but in 12c it supports Many databases to one instance
What is multitenant Architecture?
*The Multiple tenants share the same source of a mutual benefit for different purposes at a very broad level like the same applies to Oracle database which means multiple databases can share a single database instance resources for different purposes on the same server.
*The Oracle 12c which is built on mulitenant foundation is called container database (CDB) and each container (CDB) resides inside is called pluggable database
https://ampersandacademy.com/tutorials/oracle-12c