Introduction

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This guide is a foundational reference for aspiring and junior Oracle Database Administrators (DBAs). It introduces key concepts and internal components of Oracle Database, essential for managing real-world environments.

Key Focus

  • Core architecture: database vs spreadsheet, DBMS types, Oracle editions
  • Memory structures: SGA, PGA
  • Storage: tablespaces, schema objects
  • Oracle background processes needed for daily operations

💡 Includes practical knowledge on Container Databases (CDB), Automatic Diagnostic Repository (ADR), system files, and key processes like PMON, SMON, LGWR, ARCn — all critical for tuning, troubleshooting, and uptime assurance.

Build a solid foundation in Oracle internals before advancing to backups, patching, replication, and high availability.

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