Preface

This chapter desc ribes transporting data in data warehouses.

This chapter describes transforming and loading data in d ata warehouses.

This chapter describes how to refresh a data warehouse.

This cha pter describes how to use Change Data Capture capabilities.

This chapter describes how to use the SQLAccess Advi sor.

This chapter describes how to use query rewrite.

This chapter d escribes the schemas useful in data warehousing environments.

This chapter explains how to u se SQL aggregation in data warehouses.

This chapter explains how to use analytic functions in data warehouses.

This chapter explains how to use the spreadsheet clause for SQL modeling.

This c hapter describes using analytic services and data mining in combination with Oracle Database10g.

This chapter describes how to tune data warehouses using parallel execution.

The glossary defines important terms used in this guide.< /p>

Related Doc umentation

For more information, see these Oracle resources:

• Oracle Database Performance Tuning Guide

Many of the examples in t his book use the sample schemas of the seed database, which is installed by default when you install Oracle. Refer to Oracle Database Sample Schemas for information on how these schemas we re 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 not es, installation documentation, white papers, or other collateral, please visit the Oracle Technology Network (OTN). You must registe r 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 direct ly to the documentation section of the OTN Web site at

ht
tp://otn.oracle.com/documentation

For additional information, see:

• The Data Warehous e Toolkit by Ralph Kimball (John Wiley and Sons, 1996)

• Building the Data Warehouse by Will iam Inmon (John Wiley and Sons, 1996)

Conventions

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

• Conventions in Text

• Conventions in Code Examples

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

SELECT username FROM dba_users WHERE usern
ame = 'MIGRATE';

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

Documentation Accessibility

Our goal is to make Oracle products, services, and s upporting 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 oth er market-leading technology vendors to address technical obstacles so that our documentation can be accessible to all of our custome rs. 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.

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Convention	Meaning	Example
[ ]	Brackets enclose one or more optional items. Do not enter the brackets.	DECIMAL (digits [ , precision ])
{ }	Braces enclose two or more items, one of which is required. Do not enter the braces.	{ENABLE | DISABLE}
|	A vertical bar represents a choice of two or more options within brackets or braces. Enter one of the options. Do not enter the v ertical bar.	{ENABLE | DISABLE} [COMPRESS | NOCOMPRESS]
...	Horizontal ellipsis points indicate either: That we have o mitted parts of the code that are not directly related to the example That you can repeat a portion of t he code	CREATE TABLE ... AS subquery; SELECT col1, col2, ... , coln FROM employees;
. . .	V ertical ellipsis points indicate that we have omitted several lines of code not directly related to the example.	SQL> SELECT NAME FROM V$DATAFILE; NAME ------------------------------------ /fsl/dbs/tbs_01.dbf /fs1/dbs/tbs_02.dbf . . . /fsl/dbs/tbs_09.dbf 9 rows selected.
Other notation	You must enter symbols other than brackets, braces, vertical bars, and ellipsis points as shown.	acctbal NUMBER(11,2); acct CONSTANT NUMBER(4) := 3;
Italics	Italicized text indicates placeholders or variables for which you must supply particular values.	CONNECT SYSTEM/system_password DB_NAME = database_name
UPPERCASE	Uppercase typeface indicates elements supplied by the system. We show these terms in uppercase in order to distinguish them from terms you define. Unless terms appear in brackets, enter them in the order and with the spelling s hown. However, because these terms are not case sensitive, you can enter them in lowercase.	SELECT last_name, employee_id FROM employees; SELECT * FROM USER_TABLES; DROP TABLE hr.employees; < /pre>
lowercase	Lowercase typeface indicates programmatic elements that you supply. For exa mple, lowercase indicates names of tables, columns, or files. Note: Some programmatic elements use a mixture of UPPERCASE and lowercase. Enter these elements as shown.	SELECT last_name, employee_id FROM employees; sqlplus hr/hr CREATE USER mjones IDENTIFIED BY ty3MU9;

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