Two stages: Front-end and back-end , Front-end: Desktop Report, Back-end: ETL, Programing, Sample Architecture Plan Document Outline, Data Stores (Source, Staging, Presentation Servers). Title. Business Process DM: Relational DMBS, Analysis Services i.e Inventory, Orders, Billing, Returns. Ralph Kimball's paradigm: Data warehouse is the conglomerate of all data marts within the enterprise. Kimball, Ralph, and Margy Ross. 2004. Advantages: Easier to comprehend, Extensible to handle change, Better performance. Dimensional modeling (DM) is part of the Business Dimensional Lifecycle methodology developed by Ralph Kimball which includes a set of methods, techniques and concepts for use in data warehouse design. If you doubt what I’m saying on that score, just check out this discussion of Bill Inmon’s definition of a data warehouse and this comparison of Inmon’s and Ralph Kimball’s frameworks. This ensures that the integrity and consistency of data is kept intact across the organization. Dimension Modeling Process (Kimball approach): 4 steps, 1: Identify the business process (what row on the matrix should we start with?). What is a Typical Warehouse Architecture? The data warehouse truly serves as the single source of truth for the enterprise, as it is the only source for the data marts and all the data in the data warehouse is integrated. Which approach should be used when? Need resources who are experts in data modeling and of the business itself. Combine all attribute into Master dimensions table, Use the Master dimension to map the business key in the fact rows to the surrogate key for each business process that uses the dimension, Data profiling: Understand data structure, relationships an business rules, Identify and document data problem, Tools: SQL, BI Tools, RS project. Here is a complete library of dimensional modeling techniques-- the most comprehensive collection ever written. In terms of how to architect the data warehouse, there are two distinctive schools of thought: the Inmon method and Kimball method. Kimball did not address how the data warehouse is built like Inmon did, rather he focused on the functionality of a data warehouse. In a hybrid model, the data warehouse is built using the Inmon model, and on top of the integrated data warehouse, the business process oriented data marts are built using the star schema for reporting. Data redundancy is avoided as much as possible. Inmon, W. H. Building the Data Warehouse, Fourth Edition. This includes personalizing content, using analytics and improving site operations. Map source tables to each target and identify required transformations. More data profiling tools [https://en.wikipedia.org/wiki/Data_profiling#/media/File:Populated_Data_Profiling_Tools.jpg], The DWH / BI System architecture is the set of components and functionality needed to meet the business requirements. Manage all the above functions in a coherent system. Database design. Here are the deciding factors that can help an architect choose between the two: It has been proven that both the Inmon and Kimball approach work for successfully delivering data warehouses. The Data Warehouse Toolkit: The Definitive Guide to Dimensional Modeling, Third Edition. Prentice Hall, 2003. Ralph Kimball provided a more concise definition of a data warehouse: A data warehouse is a copy of transaction data specifically structured for query and analysis. CUBE: logical connection of data in database does not exist in database. Phase 2 project scope: Initial business process life-cycle iteration. There is no right or wrong between these two ideas, as they represent different data warehousing philosophies. The next phase includes loading data into a dimensional model that’s denormalized by nature. Source Server for data dimension row when Attribute value changes called as modeling... 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