Oracle Database 19c Multitenant Architecture

1. Container Database (CDB): Hosts multiple Pluggable Databases (PDBs) within a single Oracle instance.
2. Pluggable Databases (PDBs): Individual, self-contained databases that can be plugged into or unplugged from a CDB.
3. Root Container (CDB$ROOT): Contains system metadata and common objects shared by all PDBs.
4. Seed PDB (PDB$SEED): A template PDB used to create new PDBs quickly.

Before learning Oracle Database 19c Multitenant Architecture, it's beneficial to have the following skills:

1. Basic Database Knowledge: Understanding of database concepts and operations.
2. Oracle Database Fundamentals: Familiarity with Oracle Database architecture and administration.
3. SQL and PL/SQL: Proficiency in SQL and Oracle's procedural language PL/SQL.
4. Operating System Skills: Basic skills in operating systems like Linux and Windows where Oracle Database runs.

By learning Oracle Database 19c Multitenant Architecture, you gain the following skills:

1. Multitenant Database Management: Ability to manage multiple pluggable databases (PDBs) within a single container database (CDB).
2. Resource Allocation: Skills to efficiently allocate and manage resources across multiple PDBs.
3. Isolation and Security: Understanding of how to maintain data and operational isolation between PDBs for enhanced security.
4. Consolidation: Knowledge of consolidating multiple databases into a single CDB to reduce overhead and resource usage.