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Multidimensional analysis

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Multidimensional Analysis Introduction …

Multidimensional Analysis Introduction
Basic Concepts like Cube/OLAP/MDX

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  • 不是很严谨维度是一种描述信息,往往业务数据有很多维度对其的分析通常有钻取、切片、切块等
  • Dimension和FactDimension是Fact的描述信息,是它的上下文Dimension中包含了Hierarchy,即层次,Hierarchy包含了Level,即层,Level中包含了Member,Member的描述属性就是Attribute
  • 微软推出事实标准
  • Transcript

    • 1. Multidimensional Analysis
      Author: Sid Xing
    • 2. Content
      Multidimensional
      Cube
      OLAP
      MDX
      Solutions
    • 3. What is multidimensional?
      Sales = $2.5
      US Sales = $2.5
      US 2010 Sales = $2.5
      IBM US 2010 Sales = $2.5
      ….
      1 dimension
      2 dimensions
      >= 3 dimensions
      Dot
      Line
      Flat
      Cube
    • 4. What’s a “Cube”?
      Cell
      Dimension
      Members
      Jan
      ...
      Start
      End
      Q1
      Q2
      ...
      April 1
      June 30
      Feb
      2005
      2006
      ...
      Attributes
      Hierarchy/Levels
      Products
      Order Methods
      Camping Equipment
      Golf Equipment
      Fax
      Outdoor Protection
      Telephone
      Mountaineering Equipment
      Mail
      Personal Accessories
      E-Mail
      Web
      Time
      2005
      Q1
      Q2
      Q3
      Q4
    • 5. Cube Intro
      Cube:
      Mapping
      Tables:
    • OLAP
      OLAP = Online Analysis Processing
      ROLAP = Relational OLAP
      MOLAP = Multidimensional OLAP
      HOLAP = Hybrid OLAP
    • 11. ROLAP vs. MOLAP
    • 12. MDX
      MDX = Multidimensional Expression
      Query language for OLAP database, like SQL for relational database.
      Eg.
      SELECT { [Measures].[Store Sales] } ON COLUMNS,
      { [Date].[2002], [Date].[2003] } ON ROWS
      FROM Sales
      WHERE ( [Store].[USA].[CA] )
    • 13. Popular Solutions
      IBM CognosPowerPlay / TM1
      Oracle Hyperion Essbase
      Microsoft SQL Server Analysis Service
      An Introduction to OLAP in SQL Server 2005
    • 14. Reference
      OLAP/MOLAP/ROLAP/HOLAP
      Wikipedia: Multidimensional Analysis
      Wikipedia: MDX
      OLAP, Cubes and Multidimensional Analysis
    • 15. Thanks

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