Call now: 252-767-6166  
Oracle Training Oracle Support Development Oracle Apps

 E-mail Us
 Oracle Articles
New Oracle Articles

 Oracle Training
 Oracle Tips

 Oracle Forum
 Class Catalog

 Remote DBA
 Oracle Tuning
 Emergency 911
 RAC Support
 Apps Support
 Oracle Support

 SQL Tuning

 Oracle UNIX
 Oracle Linux
 Remote s
 Remote plans
 Application Server

 Oracle Forms
 Oracle Portal
 App Upgrades
 SQL Server
 Oracle Concepts
 Software Support

 Remote S


 Consulting Staff
 Consulting Prices
 Help Wanted!


 Oracle Posters
 Oracle Books

 Oracle Scripts

Don Burleson Blog 







Oracle 8 Tips  

by Burleson Consulting

The Data Warehouse Development Life Cycle

Online Analytical Processing and Oracle

Relational OLAP (ROLAP)

The advent of the multidimensional database led to an effort by tools vendors to create a method where data could be extracted from a relational database and presented to end users as if it were from a multidimensional database (see Figure 5.17). There are several methods for accessing a relational database and presenting aggregated data as if it were from a multidimensional database. These alternatives include ROLAP middleware tools and downloading pre-aggregated data to local pivot tables. Another common approach is to insert a metadata server between the OLTP relational database and the query tool.

Figure 5.17  Overview of a ROLAP system.

In order to be considered a ROLAP product, a tool must extract runtime data from a relational database, present summarized data in cross-tabular format, and possess a mechanism for translating the relational design into a multidimensional format. Examples of popular ROLAP products include:

*   DSS Agent by Microstrategies

*   Metacube by Stanford Technology Group

*   Holos by Holistic Systems

*   AXSYS Suite by Information Advantage

*   Red Brick Warehouse by Red Brick Systems

*   Prodea Beacon by Platinum Technology

ROLAP systems provide extremely flexible query engines by making any number of operational data stores available to end users. These back-end databases are usually relational databases, but ROLAP tools can also extract from a variety of different relational database.

ROLAP tools require the definition of the mapping between the OLAP model and the relational database, and generate SQL to extract the required data from the operational databases in a very similar fashion to the SQL generators described in Chapter 4.

This is an excerpt from "High Performance Data Warehousing", copyright 1997.
If you like Oracle tuning, you may enjoy the book Oracle Tuning: The Definitive Reference , with over 900 pages of BC's favorite tuning tips & scripts. 

You can buy it directly from the publisher and save 30%, and get instant access to the code depot of Oracle tuning scripts.
Oracle Training at Sea
oracle dba poster

Follow us on Twitter 
Oracle performance tuning software 
Oracle Linux poster


Burleson is the American Team

Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.

Errata?  Oracle technology is changing and we strive to update our BC Oracle support information.  If you find an error or have a suggestion for improving our content, we would appreciate your feedback.  Just  e-mail:  

and include the URL for the page.


Burleson Consulting

The Oracle of Database Support

Oracle Performance Tuning

Remote DBA Services


Copyright © 1996 -  2020

All rights reserved by Burleson

Oracle ® is the registered trademark of Oracle Corporation.