Thursday, November 22, 2007

FREE book: IBM WebSphere Information Analyzer & Data Quality Assessment

This redbook describes a usage scenario that covers all dimensions of profiling, rule building, deployment, and quality monitoring through a data integration lifecycle.

FREE book: Getting Started with DB2 Express-C V9.1

Sunday, November 18, 2007

O-RSS Reader

O-RSS Reader - An Oracle PL/SQL API to enable persistent storage of RSS feeds within an Oracle DB. version is now available on sourceforge. In that new version you will find a sample APEX application.

O-RSS can be used on Oracle Database 10g Express Edition

Sunday, November 04, 2007

Data Warehouse Project Lifecycle by Dylan Wan

Here is the typical lifecycle for data warehouse deployment project:

0. Project Scoping and Planning
Project Triangle - Scope, Time and Resource.
* Determine the scope of the project - what you would like to accomplish? This can be defined by questions to be answered. The number of logical star and number of the OLTP sources
* Time - What is the target date for the system to be available to the users
* Resource - What is our budget? What is the role and profile requirement of the resources needed to make this happen.

1. Requirement
* What are the business questions? How does the answers of these questions can change the business decision or trigger actions.
* What are the role of the users? How often do they use the system? Do they do any interactive reporting or just view the defined reports in guided navigation?
* How do you measure? What are the metrics?

2. Front-End Design
* The front end design needs for both interactive analysis and the designed analytics workflow.
* How does the user interact with the system?
* What are their analysis process?

3. Warehouse Schema Design
* Dimensional modeling - define the dimensions and fact and define the grain of each star schema.
* Define the physical schema - depending on the technology decision. If you use the relational tecknology, design the database tables

4. OLTP to data warehouse mapping
* Logical mapping - table to table and column to column mapping. Also define the transformation rules
* You may need to perform OLTP data profiling. How often the data changes? What are the data distribution?
* ETL Design -include data staging and the detail ETL process flow.

5. Implementation
* Create the warehouse and ETL staging schema
* Develop the ETL programs
* Create the logical to physical mapping in the repository
* Build the end user dashboard and reports

6. Deployment
* Install the Analytics reporting and the ETL tools.
* Specific Setup and Configuration for OLTP, ETL, and data warehouse.
* Sizing of the system and database
* Performance Tuning and Optimization

7. Management and Maintenance of the system
* Ongoing support of the end-users, including security, training, and enhancing the system.
* You need to monitor the growth of the data.

Article from

Better SQL*Plus

rlwrap - is a 'readline wrapper' that uses the GNU readline library to allow the editing of keyboard input for any other command. Now your's commands history is remembered :)