Oracle/Oracle DBA

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Question
Respected sir,
     i am prashant from india actually i am fresher for oracle and i want to learn oracle DBA please can you sugest me to start oraclefrom begining what should i learn before oracle to build my basic strong because in future i need to become very good in oracle and i dont want any confusion about programmig in oracle..thanks in advance

Answer
Hi Prashant,

First and foremost, you must have a very strong understanding of the concepts and practical proficiency with Oracle SQL (including PL/SQL). It's not just about writing queries but also understanding how the Oracle optimizer will interpret it and execute it within the database environment. This alone is a 2-3 years hands on practical learning (along with SQL training).

AT this point should you decide to pursue development (e.g. programming) you can. If you continue your studies along the DBA path you would need to learn the following topics:


Exploring the Oracle Database Architecture

   Oracle Database Architecture Overview
   Oracle ASM Architecture Overview
   Process Architecture
   Memory structrues
   Logical and physical storage structures
   ASM storage components

Installing your Oracle Software

   Tasks of an Oracle Database Administrator
   Tools Used to Administer an Oracle Database
   Installation: System Requirements
   Oracle Universal Installer (OUI)
   Installing Oracle Grid Infrastructure
   Installing Oracle Database Software
   Silent Install

Creating an Oracle Database

   Planning the Database
   Using the DBCA to Create a Database
   Password Management
   Creating a Database Design Template
   Using the DBCA to Delete a Database

Managing the Oracle Database Instance

   Start and stop the Oracle database and components
   Use Oracle Enterprise Manager
   Access a database with SQLPlus
   Modify database installation parameters
   Describe the stages of database startup
   Describe database shutdown options
   View the alert log
   Access dynamic performance views

Manage the ASM Instance

   Set up initialization parameter files for ASM instance
   Start up and shut down ASM instances
   Administer ASM disk groups

Configuring the Oracle Network Environment

   Use Enterprise Manager to create and configure the Listener
   Enable Oracle Restart to monitor the listener
   Use tnsping to test Oracle Net connectivity
   Identify when to use shared servers and when to use dedicated servers

Managing Database Storage Structures

   Storage Structures
   How Table Data Is Stored
   Anatomy of a Database Block
   Space Management in Tablespaces
   Tablespaces in the Preconfigured Database
   Actions with Tablespaces
   Oracle Managed Files (OMF)

Administering User Security

   Database User Accounts
   Predefined Administrative Accounts
   Benefits of Roles
   Predefined Roles
   Implementing Profiles

Managing Data Concurrency

   Data Concurrency
   Enqueue Mechanism
   Resolving Lock Conflicts
   Deadlocks

Managing Undo Data

   Data Manipulation
   Transactions and Undo Data
   Undo Data Versus Redo Data
   Configuring Undo Retention

Implementing Oracle Database Auditing

   Describe DBA responsibilities for security
   Enable standard database auditing
   Specify audit options
   Review audit information
   Maintain the audit trail

Database Maintenance

   Manage optimizer statistics
   Manage the Automatic Workload Repository (AWR)
   Use the Automatic Database Diagnostic Monitor (ADDM)
   Describe and use the advisory framework
   Set alert thresholds
   Use server-generated alerts
   Use automated tasks

Performance Management

   Performance Monitoring
   Managing Memory Components
   Enabling Automatic Memory Management (AMM)
   Automatic Shared Memory Advisor
   Using Memory Advisors
   Dynamic Performance Statistics
   Troubleshooting and Tuning Views
   Invalid and Unusable Objects

Backup and Recovery Concepts

   Part of Your Job
   Statement Failure
   User Error
   Understanding Instance Recovery
   Phases of Instance Recovery
   Using the MTTR Advisor
   Media Failure
   Archive Log Files

Performing Database Backups

   Backup Solutions: Overview
   Oracle Secure Backup
   User-Managed Backup
   Terminology
   Recovery Manager (RMAN)
   Configuring Backup Settings
   Backing Up the Control File to a Trace File
   Monitoring the Flash Recovery Area

Performing Database Recovery

   Opening a Database
   Data Recovery Advisor
   Loss of a Control File
   Loss of a Redo Log File
   Data Recovery Advisor
   Data Failures
   Listing Data Failures
   Data Recovery Advisor Views

Moving Data

   Describe ways to move data
   Create and use directory objects
   Use SQL*Loader to move data
   Use external tables to move data
   General architecture of Oracle Data Pump
   Use Data Pump export and import to move data

Working with Support

   Use the Enterprise Manager Support Workbench
   Work with Oracle Support
   Log service requests (SR)
   Manage patches

Core Concepts and Tools of the Oracle Database

   The Oracle Database Architecture: Overview
   ASM Storage Concepts
   Connecting to the Database and the ASM Instance
   DBA Tools Overview

Configuring for Recoverability

   Purpose of Backup and Recovery (B&R), Typical Tasks and Terminology
   Using the Recovery Manager (RMAN)
   Configuring your Database for B&R Operations
   Configuring Archivelog Mode
   Configuring Backup Retention
   Configuring and Using a Flash Recovery Area (FRA)

Using the RMAN Recovery Catalog

   Tracking and Storing Backup Information
   Setting up a Recovery Catalog
   Recording Backups
   Using RMAN Stored Scripts
   Managing the Recovery Catalog (Backup, Export, Import, Upgrade, Drop and Virtual Private Catalog)

Configuring Backup Settings

   Configuring and Managing Persistent Settings for RMAN
   Configuring Autobackup of Control File
   Backup optimization
   Advanced Configuration Settings: Compressing Backups
   Configuring Backup and Restore for Very Large Files (Multisection)

Creating Backups with RMAN

   RMAN backup types
   Creating and Using the following:
   - Backup Sets and Image Copies
   - Whole Database Backup
   - Fast Incremental Backup
   - Configure Backup Destinations
   - Duplexed Backup Sets
   - Archival Backups

Restore and Recovery Task

   Restoring and Recovering
   Causes of File Loss
   Automatic Tempfile Recovery
   Recovering from the Loss of a Redo Log Group
   Recovering from a Lost Index Tablespace
   Re-creating a Password Authentication File
   Complete and Incomplete Recovery
   Other Recovery Operations

Using RMAN to Perform Recovery

   Complete Recovery after Loss of a Critical or Noncritical Data File
   Recovering Image Copies and Switching Files
   Restore and Recovery of a Database in NOARCHIVELOG Mode
   Incomplete Recovery
   Performing Recovery with a Backup Control File
   Restoring from Autobackup: Server Parameter File and Control File
   Restoring and Recovering the Database on a New Host

Monitoring and Tuning RMAN

   Monitoring RMAN Jobs
   Balance Between Speed of Backup Versus Speed of Recovery
   RMAN Multiplexing
   Synchronous and Asynchronous I/O
   Explaining Performance Impact of MAXPIECESIZE, FILESPERSET, MAXOPENFILES and BACKUP DURATION

Diagnosing the Database

   Data Recovery Advisor (DRA)
   Block Corruption
   Automatic Diagnostic Repository (ADR)
   Health Monitor
   The ADR Command-Line Tool, ADRCI

Using Flashback Technology I

   Flashback Technology: Overview and Setup
   Using Flashback Technology to Query Data
   Flashback Table
   Flashback Transaction Query
   Performing Flashback Transaction Backout

Using Flashback Technology II

   Oracle Total Recall
   Flashback Drop and the Recycle Bin

Performing Flashback Database

   Configuring Flashback Database
   Performing Flashback Database Operations
   Monitoring Flashback Database

Managing Memory

   Oracle Memory Structures
   Oracle Database Memory Parameters
   Using Automatic Memory Management
   Automatic Shared Memory Management
   Using Memory Advisors
   Using Data Dictionary Views

Managing Database Performance

   Tuning Activities
   Using Statistic Preferences
   Optimizer Statistics Collection
   Monitor the Performance of Sessions and Services
   Automatic Workload Repository (AWR)
   Describing the Benefits of Database Replay

Managing Performance by SQL Tuning

   SQL Tuning and SQL Advisors
   Using SQL Tuning Advisor
   SQL Access Advisor
   SQL Performance Analyzer Overview

Managing Resources

   Database Resource Manager: Overview and Concepts
   Accessing and Creating Resource Plans
   Creating Consumer Group
   Specifying Resource Plan Directives, including:
   - Limiting CPU Utilization at the Database Level
   - Instance Caging
   Activating a Resource Plan
   Monitoring the Resource Manager

Automating Tasks with the Scheduler

   Simplifying Management Tasks
   Creating a Job, Program, and Schedule
   Using Time-Based, Event-Based, and Complex Schedules
   Describing the Use of Windows, Window Groups, Job Classes, and Consumer Groups
   Multi-Destination Jobs

Managing Space in Blocks

   Free Space Management
   Monitoring Space
   Compressing Data

Managing Space in Segments

   Segment Creation on Demand
   Additional Automatic Space-Saving Functionalit
   Shrinking Segments
   Segment Advisor
   Managing Resumable Space Allocation

Managing Space for the Database

   Using 4 KB-Sector Disks
   Transporting Tablespaces
   Transporting Databases

Duplicating a Database

   Purpose and Methods of Cloning a Database
   Using RMAN to Create a Duplicate Database
   Cloning a Database from a Backup
   Duplicate a Database Based on a Running Instance
   Targetless Duplicating a Database

While you can take two 5 day courses from an Oracle Education Centre, it will require 3-5 years of hands-on practical experience to achieve the basic skill set. Assuming that you are able to practice 70%+ of the material in the list above, in another 5 years (year 10), you would be able to acquire a senior Oracle DBA competency.

I hope this helps you to focus your training on the skillset required.

Peter

Oracle

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Peter Choi

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I am a senior Oracle DBA, PeopleSoft HCM specialist and Project Manager with 15+ years experience. I have been working with PeopleSoft (HRMS/HCM 5, 7, 7.x and 8.9, 9.x), Oracle RDBMS (7.3 - 11gR2) on various Unix and MS-Windows platforms, and some Oracle Application Server (9i - 11gR1). I also have experience with the configuration and administration of PeopleSoft's Internet Architecture (PIA) and the Oracle 11g Fusion Middleware and Oracle Business Intelligence (OBI).

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