Book Image

OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide

Book Image

OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide

Overview of this book

Oracle Database Server is the most widely used relational database in the world today. This book gives you the essential skills to master the fundamentals of Oracle database administration and prepares you for Oracle DBA certification."OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide" prepares you to master the fundamentals of Oracle database administration using an example driven method that is easy to understand. The real world examples will prepare you to face the daily challenges of being a database administrator.Starting with the essentials of why databases are important in today's information technology world and how they work, you are then guided through a full, customized installation of the Oracle software and creating your own personal database. We then examine fundamental concepts of Oracle, including architecture, storage structures, security, performance tuning, networking, and instance management. Finally, we take an in-depth look at some of the most important concepts in the daily life of an Oracle DBA - backup, recovery, and data migration."OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide" provides you with the skills you need in order to become a successful Oracle DBA, both for certification and real life tasks.
Table of Contents (24 chapters)
OCA Oracle Database 11g: Database Administration I: A Real-World Certification Guide
Credits
Foreword
About the Author
About the Reviewer
www.packtpub.com
Preface
Index

Understanding database startup and shutdown


One of the most fundamental operations in database administration is the ability to shut down and start up the database. However, this operation is considerably more involved than two simple commands. It is important to understand what happens "under the hood" during the process of starting and stopping an Oracle instance.

Understanding the startup process

To comprehend the startup process for the database, it is important to first understand the state of the database before it is started. Currently, our database has been started and is open—we've used it to run several queries in the previous chapters. This is because, at some point, either during the creation of the database using DBCA, or by Windows services, a startup command was issued to the database. However, before that command is issued, the database is in an inert state that is referred to as cold . In this state, we should understand several points about the instance and database. First...