Preface

This manual guides you through the process of planning and executing database upgrades on the Oracle Database. In addition, this manual provides information about compatibility, about upgrading applications to the new Oracle Database 10g release, and about important changes in the new release, such as initialization parameter changes and data dictionary changes.

Oracle Database Upgrade Guide contains information that describes the features and functionality of the Oracle Database (also known as the standard edition) and the Oracle Database Enterprise Edition products. The Oracle Database and the Oracle Database Enterprise Edition have the same basic features. However, several advanced features are available only with the Enterprise Edition, and some of these are optional. For example, to use application failover, you must have the Enterprise Edition with the Real Application Clusters option.

This preface contains these topics:

• Audience

• Documentation Accessibility

• Structure

• Related Documents

• Conventions

Audience

Oracle Database Upgrade Guide is intended for database administrators (DBAs), application developers, security administrators, system operators, and anyone who plans or executes Oracle Database upgrades.

To use this document, you need to be familiar with the following:

• Relational database concepts

• Your current release of the Oracle Database

• Your operating system environment

Documentation Accessibility

Our goal is to make Oracle products, services, and supporting documentation accessible, with good usability, to the disabled community. To that end, our documentation includes features that make information available to users of assistive technology. This documentation is available in HTML format, and contains markup to facilitate access by the disabled community. Standards will continue to evolve over time, and Oracle is actively engaged with other market-leading technology vendors to address technical obstacles so that our documentation can be accessible to all of our customers. For additional information, visit the Oracle Accessibility Program Web site at

http://www.oracle.com/accessibility/

Accessibility of Code Examples in Documentation

JAWS, a Windows screen reader, may not always correctly read the code examples in this document. The conventions for writing code require that closing braces should appear on an otherwise empty line; however, JAWS may not always read a line of text that consists solely of a bracket or brace.

Accessibility of Links to External Web Sites in Documentation

This documentation may contain links to Web sites of other companies or organizations that Oracle does not own or control. Oracle neither evaluates nor makes any representations regarding the accessibility of these Web sites.

Structure

This document contains:

Chapter 1, "Introduction"

This chapter provides an overview of the database upgrade process, as well as information about running multiple releases of the Oracle Database.

Chapter 2, "Preparing to Upgrade"

This chapter describes the steps to complete before upgrading a database.

Chapter 3, "Upgrading a Database to the New Oracle Database 10g Release"

This chapter guides you through the process of upgrading a database to the new release of the Oracle Database.

Chapter 4, "After Upgrading a Database"

This chapter describes the actions to complete after upgrading a database to the new release of the Oracle Database.

Chapter 5, "Compatibility and Interoperability"

This chapter contains information about compatibility and interoperability between different releases of the Oracle Database, including detailed information about the COMPATIBLE initialization parameter.

Chapter 6, "Upgrading Your Applications"

This chapter provides general information about upgrading your applications and tools for use with the new release of the Oracle Database.

Chapter 7, "Downgrading a Database Back to the Previous Oracle Database Release"

This chapter guides you through the process of downgrading a database that has been upgraded to the new release of the Oracle Database.

Chapter 8, "Data Copying Using Export/Import"

This chapter provides an overview of using the Export and Import utilities to copy data between different releases of the Oracle Database.

Appendix A, "Initialization Parameter and Data Dictionary Changes"

This appendix lists changes to initialization parameters and the data dictionary across different releases of the Oracle Database. This appendix also discusses compatibility issues with certain initialization parameters.

Appendix B, "Migrating from Server Manager to SQL*Plus"

This appendix guides you through the process of modifying your Server Manager line mode scripts for use with SQL*Plus.

Related Documents

For more information, see these Oracle resources:

• Oracle Database Concepts for a comprehensive introduction to the concepts and terminology used in this manual

• Oracle Database Administrator's Guide for information about administering the Oracle Database

• Oracle Database SQL Reference for information on Oracle's SQL commands and functions

• Oracle Database Utilities for information about the utilities bundled with the Oracle Database, including Export, Import, and SQL*Loader

• Oracle Net Services Administrator's Guide for information about Oracle Net Services

Many of the examples in this book use the sample schemas, which are installed by default when you select the Basic Installation option with an Oracle Database installation. Refer to Oracle Database Sample Schemas for information on how these schemas were created and how you can use them yourself.

Printed documentation is available for sale in the Oracle Store at

http://oraclestore.oracle.com/

To download free release notes, installation documentation, white papers, or other collateral, please visit the Oracle Technology Network (OTN). You must register online before using OTN; registration is free and can be done at

http://otn.oracle.com/membership/

If you already have a username and password for OTN, then you can go directly to the documentation section of the OTN Web site at

http://otn.oracle.com/documentation/

Conventions

This section describes the conventions used in the text and code examples of this documentation set. It describes:

• Conventions in Text

• Conventions in Code Examples

• Conventions for Windows Operating Systems

Conventions in Text

We use various conventions in text to help you more quickly identify special terms. The following table describes those conventions and provides examples of their use.

Conventions in Code Examples

Code examples illustrate SQL, PL/SQL, SQL*Plus, or other command-line statements. They are displayed in a monospace (fixed-width) font and separated from normal text as shown in this example:

SELECT username FROM dba_users WHERE username = 'MIGRATE';

The following table describes typographic conventions used in code examples and provides examples of their use.

[ ]

DECIMAL (digits [ , precision ])

{ }

{ENABLE | DISABLE}

|

{ENABLE | DISABLE}
[COMPRESS | NOCOMPRESS]

...

CREATE TABLE ... AS subquery;

SELECT col1, col2, ... , coln FROM employees;

acctbal NUMBER(11,2);
acct    CONSTANT NUMBER(4) := 3;

Italics

CONNECT SYSTEM/system_password
DB_NAME = database_name

UPPERCASE

SELECT last_name, employee_id FROM employees;
SELECT * FROM USER_TABLES;
DROP TABLE hr.employees;

lowercase

SELECT last_name, employee_id FROM employees;
sqlplus hr/hr
CREATE USER mjones IDENTIFIED BY ty3MU9;

Conventions for Windows Operating Systems

The following table describes conventions for Windows operating systems and provides examples of their use.

C:\oracle\oradata>

C:\>exp HR/HR TABLES=employees QUERY=\"WHERE job_id='SA_REP' and salary<8000\"

HOME_NAME

C:\> net start OracleHOME_NAMETNSListener