BC remote Oracle DBA - Call (800) 766-1884  
Oracle Consulting Oracle Training Development

Remote DBA

Remote DBA Plans  

Remote DBA Service

Remote DBA RAC

Remote DBA Oracle Home
Remote DBA Oracle Training
Remote DBA SQL Tuning Consulting
Remote DBA Oracle Tuning Consulting
Remote DBA Data Warehouse Consulting
Remote DBA Oracle Project Management
Remote DBA Oracle Security Assessment
Remote DBA Unix Consulting
Burleson Books
Burleson Articles
Burleson Web Courses
Burleson Qualifications
Oracle Links
Remote DBA Oracle Monitoring
Remote DBA Support Benefits
Remote DBA Plans & Prices
Our Automation Strategy
What We Monitor
Oracle Apps Support
Print Our Brochure
Contact Us (e-mail)
Oracle Job Opportunities
Oracle Consulting Prices





Remote DBA services

Remote DBA Support

Remote DBA RAC

Remote DBA Reasons

Remote Oracle Tuning

Remote DBA Links

Oracle DBA Support

Oracle DBA Forum

Oracle Disaster

Oracle Training

Oracle Tuning

Oracle Training

 Remote DBA SQL Server

Remote MSSQL Consulting

Oracle DBA Hosting

Oracle License Negotiation









Oracle Tips 

by Burleson Consulting

The Data Warehouse Development Life Cycle

Oracle Data Warehouse Design


Hierarchies are especially difficult to maintain in a data warehouse. Unlike finite attributes, hierarchical classifications may assign many values when an item is added to an Oracle data warehouse. The hierarchical classification displayed in Figure 4.14 shows a hierarchical attribute classification for a product.

Figure 4.14 A classification hierarchy for a product.

For example, when a transaction for the purchase of chicken wings is recorded, attributes made for the transaction need to include the sale of a chicken product, a meat product, and a food product. As such, a mechanism needs to be devised to store the hierarchy of attributes in a meaningful way and to insert the proper values each time a row is added to the fact table.
In our example, we have the following two methods for representing our hierarchy of product attributes:

1. Assign an arbitrary level classification for each level in the hierarchy. Because each level is mutually exclusive (i.e., the product cannot be both food and nonfood), the following scheme would be the most efficient use of storage in the fact table:

level_one char(1)
CONSTRAINT level_one_check
CHECK (level_one in (‘F’,‘N’);
level_two char(1)
CONSTRAINT level_two_check
CHECK (level_two in (‘A’,‘V’,’P’,’T’);
level_three char(1)
CONSTRAINT level_three_check
CHECK (level_three in (‘U’,‘B’,‘C’);

This is an excerpt from "High Performance Data Warehousing". To learn more about Oracle, try "Oracle Tuning: The Definitive Reference", by Donald K. Burleson.  You can buy it direct from the publisher at 30% off here:


Expert Remote DBA

BC is America's oldest and largest Remote DBA Oracle support provider.  Get real Remote DBA experts, call
BC Remote DBA today.



Remote DBA Service

Oracle Tuning Book


Advance SQL Tuning Book 

BC Oracle support

Oracle books by Rampant

Oracle monitoring software







BC Remote Oracle Support

Remote DBA

Remote DBA Services

Copyright ฉ 1996 -  2013 by Burleson. All rights reserved.

Oracleฎ is the registered trademark of Oracle Corporation.