The video tutorial explains Oracle's multi-tenant architecture, introduced in Oracle Database 12c. It covers the differences between Container Databases (CDB) and Pluggable Databases (PDB), the components of multi-tenant architecture, and how to create and manage PDBs. The tutorial also discusses the structure of instances and databases, the role of root and seed containers, and the data dictionary's organization. The multi-tenant architecture allows for efficient database management and is mandatory from Oracle Database 21c onwards.

What is the difference between a CDB and a PDB?

Describe the components of multi-tenant architecture.

What are the differences between local users and common users in a multi-tenant environment?

Explain the concept of shared undo and local undo configuration.

What is the significance of the root container in a CDB?

What are the limitations of creating undo tablespaces in PDBs?

How are online redo log files managed in a CDB?

What is the purpose of the seed PDB?

How does the structure of the data dictionary differ in a PDB compared to a non-CDB?

What happens during the upgrade process of a CDB?