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Introduction to Data Warehousing
 

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 ...

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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    Introduction to Data Warehousing Introduction to Data Warehousing Presentation Transcript

    • PRESENTED BY: ELVIS PEREYMER
      Introduction to Data Warehousing
      9/17/11
    • 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
    • Many names for the same thing
      9/17/11
    • 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)
      • Executive Information System
    • Many names for the same thing
      9/17/11
      • Decision Support System (DSS)
      • Executive Information System
      • Management Information System
    • Many names for the same thing
      9/17/11
      • Decision Support System (DSS)
      • Executive Information System
      • Management Information System
      • Analytics Application
    • Many names for the same thing
      9/17/11
      • Decision Support System (DSS)
      • Executive Information System
      • Management Information System
      • Analytics Application
      • Reporting System
    • Many names for the same thing
      9/17/11
      • Decision Support System (DSS)
      • Executive Information System
      • Management Information System
      • Analytics Application
      • 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.
    • 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
    • Why do I need a Data Warehouse?
      Current way of getting data or reports is not ideal
      9/17/11
    • 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
    • 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
    • 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
    • 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
    • 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
    • Why do I need a Data Warehouse?
      Summary of existing Reporting problems
      9/17/11
    • Why do I need a Data Warehouse?
      Summary of existing Reporting problems
      Difficulty in accessing your data.
      9/17/11
    • 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
    • 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
    • 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
    • The Value of the Data Warehouse
      9/17/11
      Integrated
      Multiple Source Systems
      Common Terminology
      Consistently Updated
    • 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
    • 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.
    • 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
    • The Value of the Data Warehouse
      9/17/11
      The Data Warehouse Defined:
      Integrated
      Time Variant
      Non-volatile
      Strategic Analysis Tool (Business Intelligence)
    • Demo Time!
      9/17/11
      Sample Data warehouse put together using Pentaho (an Open Source Business Intelligence solution)
    • 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
    • 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.
    • 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!
    • Summary
      9/17/11
      DW are used for
      Decision support
      Analysis
      Not the same as your operational systems
      Designed badly, they are not useful