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PRESENTED BY: ELVIS PEREYMER<br />Introduction to Data Warehousing<br />9/17/11<br />
Data Warehousing Presentation Topics<br />9/17/11<br />What is a Data Warehouse?<br />Why do I need a Data Warehouse?<br /...
Many names for the same thing<br />9/17/11<br />
Many names for the same thing<br />9/17/11<br /><ul><li>Decision Support System (DSS)</li></li></ul><li>Many names for the...
Executive Information System</li></li></ul><li>Many names for the same thing<br />9/17/11<br /><ul><li>Decision Support Sy...
Executive Information System
Management Information System</li></li></ul><li>Many names for the same thing<br />9/17/11<br /><ul><li>Decision Support S...
Executive Information System
Management Information System
Analytics Application</li></li></ul><li>Many names for the same thing<br />9/17/11<br /><ul><li>Decision Support System (DSS)
Executive Information System
Management Information System
Analytics Application
Reporting System</li></li></ul><li>Many names for the same thing<br />9/17/11<br /><ul><li>Decision Support System (DSS)
Executive Information System
Management Information System
Analytics Application
Reporting System</li></ul>a system for helping companies get the information they want, when they want it, and how they wa...
Purpose of a Data warehouse<br />Establish the foundation for Decision Support<br />Decision process of an organization wi...
Why do I need a Data Warehouse?<br />Current way of getting data or reports is not ideal<br />9/17/11<br />
Why do I need a Data Warehouse?<br />Current way of getting data or reports is not ideal<br />Dependent on a resource such...
Why do I need a Data Warehouse?<br />Current way of getting data or reports is not ideal<br />Dependent on a resource such...
Why do I need a Data Warehouse?<br />Current way of getting data or reports is not ideal<br />Dependent on a resource such...
Why do I need a Data Warehouse?<br />Current way of getting data or reports is not ideal<br />Dependent on a resource such...
Why do I need a Data Warehouse?<br />9/17/11<br />Multiple source systems collecting similar or related information.<br />...
Why do I need a Data Warehouse?<br />Summary of existing Reporting problems<br />9/17/11<br />
Why do I need a Data Warehouse?<br />Summary of existing Reporting problems<br />Difficulty in accessing your data.<br />9...
Why do I need a Data Warehouse?<br />Summary of existing Reporting problems<br />Difficulty in accessing your data.<br />U...
Why do I need a Data Warehouse?<br />Summary of existing Reporting problems<br />Difficulty in accessing your data.<br />U...
Why do I need a Data Warehouse?<br />Summary of existing Reporting problems<br />Difficulty in accessing your data.<br />U...
The Value of the Data Warehouse<br />9/17/11<br />Integrated<br />Multiple Source Systems<br />Common Terminology<br />Con...
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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 the insight that can be obtained from such a system.

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Transcript of "Introduction to Data Warehousing"

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