Intro2DW.pptx - Introduction to Data Warehousing MSBA 6320...

Info icon This preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Introduction to Data Warehousing MSBA 6320, Prof De Liu 1
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Readings: Readings Chaudhuri et. al. , An Overview of Business Intelligence Technology, Communications of the ACM, 54(8), August 2011, pp. 88-98.* Chaudhuri, Surajit, and Umeshwar Dayal. "An overview of data warehousing and OLAP technology." ACM Sigmod record 26.1 (1997): 65- 74. * Ponniah chapters 1,2,3,7* (optional) Kimball – Chapters 1 and 2* * PDFs available on course website. 2
Image of page 2
Agenda Need for Data Warehouse Concept of Data Warehouse Data Warehouse Architecture Data Warehousing Market 3
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Need for Decision-Optimized Data Storage Business people need information to make plans, decisions, and assess results What were sales volumes by region and product category for the last 3 years? Which of two new medications will result in the best outcomes (higher recovery rate and shorter hospital stay)? Data captured by complex operational systems (OLTPs) optimized to support well- defined transaction requirements Difficult to get needed information from data grounded in OLTPs 4 OLTP (On-Line Transactional Processing) is a class of information systems that facilitate and manage transaction-oriented applications, typically for data entry and retrieval transaction processing. (Wikipedia)
Image of page 4
Operational vs. Informational Data Operational (OLTP) Analytical (OLAP) Data Content Current Values Historical, derived, summarized Data Structure Optimized for transactions Optimized for complex queries Data Volume MB/GB of data GB/TB/PB… of data Access Frequency High Medium to low Access Type Read, update, delete Read-only Usage Predictable, repetitive Ad hoc, random, heuristic Response Time Sub-seconds Several seconds to minutes Users Large number; operational & data workers Relatively smaller number; data & knowledge workers 5 In computing, online analytical processing, or OLAP, is an approach to answering multi- dimensional analytical queries swiftly (Wikipedia)
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Agenda Need for Data Warehouse Concept of Data Warehouse Data Warehouse Architecture Data Warehousing Market 6
Image of page 6
The Concept of Data Warehouse “… a copy of transaction data specifically structured for query and analysis.” The Data Warehouse Toolkit, R. Kimball, John Wiley & Sons, February, 1996.
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern