Datawarehousing

Data Warehousing Hennie de Nooijer

Data Warehousing Position ,[object Object]

Controlled informationprovisioning Information provisioning DWH

Business Intelligence Data warehouse ETL Hardware RDBMS

Data Warehousing Definition ,[object Object]

A Data Warehouse is a subject-oriented, integrated, time-variant, non-updatablecollection of dataused in support of decision-making processes

Data Warehousing Expert debate ,[object Object]

Ralph Kimball Dimensional modeling Business subject focus Bottom up Data bus

Dan Linstedt Data modeling All data, all the time Method of design Data Vault

Data Warehousing Architecture Architecture (Latinarchitectura, from the Greek ἀρχιτέκτων – arkhitekton, from ἀρχι- "chief" and τέκτων "builder, carpenter") can mean: The art and science of designing and erecting buildings and other physical structures. The practice of an architect, where architecture means to offer or render professional services in connection with the design and construction of a building, or group of buildings and the space within the site surrounding the buildings, that have as their principal purpose human occupancy or use.[1] A general term to describe buildings and other structures. A style and method of design and construction of buildings and other physical structures. A wider definition may comprise all design activity, from the macro-level (urban design, landscape architecture) to the micro-level (construction details and furniture). Architecture is both the process and product of planning, designing and constructing form, space and ambience that reflect functional, technical, social, and aesthetic considerations. It requires the creative manipulation and coordination of material, technology, light and shadow. Architecture also encompasses the pragmatic aspects of realising buildings and structures, including scheduling, cost estimating and construction administration. As documentation produced by architects, typically drawings, plans and technical specifications, architecture defines the structure and/or behavior of a building or any other kind of system that is to be or has been constructed. Architectural works are often perceived as cultural and political symbols and as works of art. Historical civilizations are often identified with their surviving architectural achievements. Architecture sometimes refers to the activity of designing any kind of system and the term is common in the information technology world. ,[object Object]

Conventional architecture Current Business Demands/Wishes Integration Storage Presentation D W H TRANSFORM S T A G E Business Information Model

Is geplaatst onder /betreft werkdag Bestelling op Business Information Model Ontvangt /Is geplaatst bij heeft omvang Verplicht tot /Is realisatie van Leverancier Bestaat uit /zit in Leverings condities Is bereid te leveren /kan geleverd worden door Levering Bestaat uit /komt voor in Materiaal soort Voorziet in /wordt in voorzien door werkdag omvang Komt voor in met Moet in voorzien worden voor Wordt ontvangen door /ontvangt Bestaat uit Materiaalbehoefte magazijn Betreft de bereidhied tot het levereren aan een /kan conform worden geleverd aan Magazijn

Modern architecture Integration Storage Presentation Storage Current Business Demands/Wishes S T A G E s o u r c e D W H b u s i n e s s D W H TRANSFORM ALL DATA, ALL THE TIME Current Business Information Model

Data Warehousing Methodology A methodology is instantiated and materialized by a set of methods, techniques and tools. A tool is any instrument or apparatus that is necessary to the performance of some task. A methodology does not describe specific methods; nevertheless it does specify several processes that need to be followed. These processes constitute a generic framework. They may be broken down in sub-processes, they may be combined, or their sequence may change. However any task exercise must carry out these processes in one form or another.[3] Methodology may be a description of process, or may be expanded to include a philosophically coherent collection of theories, concepts or ideas as they relate to a particular discipline or field of inquiry. Methodology may refer to nothing more than a simple set of methods or procedures, or it may refer to the rationale and the philosophical assumptions that underlie a particular study relative to the scientific method. For example, scholarly literature often includes a section on the methodology of the researchers. ,[object Object]

Datawarehousing

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