Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 5 docx

Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 5 docx

Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 5 docx

... source operational systems, data extraction tools, data transformation tools, the data dictionary definitions, and other sources all contribute to the data warehouse metadata. Metadata management, ... navigate through the data ware- house and any data marts. From the outset, pay special attention to metadata for your data warehouse environ- ment. Prepare a metadata initiativ...
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data warehousing fundamentals a comprehensive guide for it professionals phần 5 pptx

data warehousing fundamentals a comprehensive guide for it professionals phần 5 pptx

... warehouse data models, source-staging area mappings, staging area- warehouse mappings, data extraction rules, data transformation rules, data cleansing rules, data aggregation rules, data loading and ... METADATA 197 METADATA REPOSITORY Information Navigator Technical Metadata Business Metadata Source systems data models, structures of external data sources, staging area file...
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Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 1 ppt

Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 1 ppt

... individual transactions to change the data there. Data updates are commonplace in an operational database; not so in a data warehouse. The data in a data warehouse is not as volatile as the data in an ... Tools 50 1 Data Fusion 50 1 Multidimensional Analysis 51 1 Agent Technology 51 1 Syndicated Data 52 1 Data Warehousing and ERP 52 1 Data Warehousing a...
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Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 2 ppt

Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 2 ppt

... 3-8 Integration of KM and data warehouse. Types of Metadata Metadata in a data warehouse fall into three major categories: ț Operational Metadata ț Extraction and Transformation Metadata ț End-User ... metadata contain all of this information about the operational data sources. Extraction and Transformation Metadata. Extraction and transformation metada- ta contain data about the...
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Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 3 potx

Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 3 potx

... Chapter 2: ț Source data Production data Internal data Archived data External data ț Data staging Data extraction Data transformation Data loading ț Data storage ț Information delivery ț Metadata ț ... internal and external data sources form the source data architectural component. Source data governs the extraction of data for preparation and storage in the dat...
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Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 6 potx

Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 6 potx

... Data 123 AAAAA 234 BBBBB 3 45 CCCCC DATA STAGING Key Data 123 AAAAA 234 BBBBB 3 45 CCCCC DATA STAGING Key Data 123 AAAAA 234 BBBBB 3 45 CCCCC DATA STAGING Key Data 123 AAAAA 234 BBBBB 3 45 CCCCC DATA STAGING B EF O R AF TE R Key ... extracted data is raw data and it cannot be applied to the data warehouse. First, all the extracted data must be made usable in the...
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Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 7 ppt

Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 7 ppt

... poten- tial effect of bad data. The low-priority data may be cleansed if you have any time and re- DATA QUALITY INITIATIVE 309 DATA QUALITY INITIATIVES DATA CONSUMER (User Dept.) DATA EXPERT (User ... companies serious about data quality pull all these factors together and establish a data quality framework. Essentially, the framework provides a basis for launching data...
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Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 8 potx

Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 8 potx

... organizations gather enterprise data from the source operational systems, move the data through a transformation and cleansing process, and store the data in data warehouses in a form suitable for ... Prefabricated multidimensional cubes are not created beforehand and stored in special databases. The relational data is presented as virtual multidimensional data cubes. 364 O...
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Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 9 pdf

Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 9 pdf

... just a couple of ex- amples. Review all the initialization parameters and set each appropriately. Data Arrays What are data arrays? Suppose in a financial data mart you need to keep monthly balances of ... suitable for low-selectivity data? Why? 9. What is data partitioning? Give two reasons why data partitioning is helpful in a data warehousing environment. 10. What is...
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Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 10 pot

Data Warehousing Fundamentals A Comprehensive Guide for IT Professionals phần 10 pot

... start with a large volume of data, even a small percentage increase can result in substantial additional data. In the first place, a data warehouse may contain too much historical data. Data ... huge amounts of data that has taken years to gather and accu- mulate. The historical data may go back 10 or even up to 20 years. Before the data arrives at the data warehouse, y...
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