Introduction to Data Warehousing
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Introduction to Data Warehousing

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Elvis Pereymer will introduce the key concepts of implementing a Data Warehouse, with a focus on data access for users like business analysts, product managers and other decision makers who need......

Elvis Pereymer will introduce the key concepts of implementing a Data Warehouse, with a focus on data access for users like business analysts, product managers and other decision makers who need the insight that can be obtained from such a system.

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  • 1. PRESENTED BY: ELVIS PEREYMER
    Introduction to Data Warehousing
    9/17/11
  • 2. Data Warehousing Presentation Topics
    9/17/11
    What is a Data Warehouse?
    Why do I need a Data Warehouse?
    What are its goals?
    What are its objectives?
    Where does “Business Intelligence” fit here ?
    The software products that present the data warehouse data to users are sometimes called Business Intelligence Tools.
    Demo of “Pentaho” – an Open Source Business Intelligence tool connected to an already built Data warehouse.
    Q & A
  • 3. Many names for the same thing
    9/17/11
  • 4. Many names for the same thing
    9/17/11
    • Decision Support System (DSS)
  • Many names for the same thing
    9/17/11
    • Decision Support System (DSS)
    • 5. Executive Information System
  • Many names for the same thing
    9/17/11
    • Decision Support System (DSS)
    • 6. Executive Information System
    • 7. Management Information System
  • Many names for the same thing
    9/17/11
    • Decision Support System (DSS)
    • 8. Executive Information System
    • 9. Management Information System
    • 10. Analytics Application
  • Many names for the same thing
    9/17/11
    • Decision Support System (DSS)
    • 11. Executive Information System
    • 12. Management Information System
    • 13. Analytics Application
    • 14. Reporting System
  • Many names for the same thing
    9/17/11
    • Decision Support System (DSS)
    • 15. Executive Information System
    • 16. Management Information System
    • 17. Analytics Application
    • 18. Reporting System
    a system for helping companies get the information they want, when they want it, and how they want it - from one single source.
  • 19. Purpose of a Data warehouse
    Establish the foundation for Decision Support
    Decision process of an organization will involve analysis, data mining, forecasting, decision modeling etc. By having a common point, which can provide consistent, quality data with high response time provides the core enabler for making fast and informed decisions.
    9/17/11
  • 20. Why do I need a Data Warehouse?
    Current way of getting data or reports is not ideal
    9/17/11
  • 21. Why do I need a Data Warehouse?
    Current way of getting data or reports is not ideal
    Dependent on a resource such as a developer
    9/17/11
  • 22. Why do I need a Data Warehouse?
    Current way of getting data or reports is not ideal
    Dependent on a resource such as a developer
    someone who knows your companies underlying database structure and is familiar with a query language such as SQL used to retrieve data.
    9/17/11
  • 23. Why do I need a Data Warehouse?
    Current way of getting data or reports is not ideal
    Dependent on a resource such as a developer
    someone who knows your companies underlying database structure and is familiar with a query language such as SQL used to retrieve data.
    Limited to Standard Reports built thereby limiting you do ad hoc reporting
    9/17/11
  • 24. Why do I need a Data Warehouse?
    Current way of getting data or reports is not ideal
    Dependent on a resource such as a developer
    someone who knows your companies underlying database structure and is familiar with a query language such as SQL used to retrieve data.
    Limited to Standard Reports built thereby limiting you do ad hoc reporting
    Performance reasons limit you to running reports during “off peak” hours
    9/17/11
  • 25. Why do I need a Data Warehouse?
    9/17/11
    Multiple source systems collecting similar or related information.
    CRM, ERP, Operational Databases, Spreadsheets
    Operational Databases may be archived and considered to be a separate source system
  • 26. Why do I need a Data Warehouse?
    Summary of existing Reporting problems
    9/17/11
  • 27. Why do I need a Data Warehouse?
    Summary of existing Reporting problems
    Difficulty in accessing your data.
    9/17/11
  • 28. Why do I need a Data Warehouse?
    Summary of existing Reporting problems
    Difficulty in accessing your data.
    Unable to perform ad-hoc reporting
    9/17/11
  • 29. Why do I need a Data Warehouse?
    Summary of existing Reporting problems
    Difficulty in accessing your data.
    Unable to perform ad-hoc reporting
    Not aware of “All” the data that is tracked in your systems.
    9/17/11
  • 30. Why do I need a Data Warehouse?
    Summary of existing Reporting problems
    Difficulty in accessing your data.
    Unable to perform ad-hoc reporting
    Not aware of “All” the data that is tracked in your systems.
    Performance issues. Data is not optimized for reporting.
    9/17/11
  • 31. The Value of the Data Warehouse
    9/17/11
    Integrated
    Multiple Source Systems
    Common Terminology
    Consistently Updated
  • 32. The Value of the Data Warehouse
    9/17/11
    Time Variant
    Data in the Warehouse is associated with a point in time
    Essential for time-series historical analysis and forecasting
  • 33. The Value of the Data Warehouse
    9/17/11
    Non-volatile
    Once loaded, data does not change.
    The answer to a given historical question will not change based on the time the question is posed to the warehouse.
  • 34. The Value of the Data Warehouse
    9/17/11
    Strategic Analysis
    Historical analysis
    Forecasting analysis
    Evaluation of performance to
    corporate strategic goals
    Discovery of revenue opportunities
    Cost reduction
  • 35. The Value of the Data Warehouse
    9/17/11
    The Data Warehouse Defined:
    Integrated
    Time Variant
    Non-volatile
    Strategic Analysis Tool (Business Intelligence)
  • 36. Demo Time!
    9/17/11
    Sample Data warehouse put together using Pentaho (an Open Source Business Intelligence solution)
  • 37. I Want One!
    9/17/11
    Plan! Plan! Plan!
    Resources
    Experienced DW Architect
    Programmers Familiar with Legacy Systems
    Users Familiar with Legacy Data
    Thank you,
    Elvis Pereymer
    Elvis.pereymer@gmail.com
    (917)754-4638
  • 38. I Want One!
    9/17/11
    How long will it take?
    On going project.
    Depends on the amount of data sources you have and the resources that understand the data sources.
    Suggestion is to start with the Agile methodology and build
    “data marts” per subject area.
  • 39. I Want One!
    9/17/11
    End User Presentation Tools
    Business Objects
    Cognos (Powerplay, Impromptu)
    Microsoft Business Intelligence Suite
    Pentaho BI Solution – Open Source
    Many, many others!
  • 40. Summary
    9/17/11
    DW are used for
    Decision support
    Analysis
    Not the same as your operational systems
    Designed badly, they are not useful