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作者 Jensen, Christian S., 1963-
書名 Multidimensional databases and data warehousing [electronic resource] / Christian S. Jensen, Torben Bach Pedersen, Christian Thomsen
出版項 San Rafael, Calif. (1537 Fourth Street, San Rafael, CA 94901 USA) : Morgan & Claypool, c2010
國際標準書號 9781608455386 (electronic bk.)
9781608455379 (pbk.)
國際標準號碼 10.2200/S00299ED1V01Y201009DTM009 doi
book jacket
說明 1 electronic text (xiii, 95 p. : ill.) : digital file
系列 Synthesis lectures on data management, 2153-5426 ; # 9
Synthesis digital library of engineering and computer science
Synthesis lectures on data management, 2153-5426 ; # 9
附註 Part of: Synthesis digital library of engineering and computer science
Series from website
Includes bibliographical references (p. 83-90) and index
1. Introduction -- Multidimensional data management -- Multidimensional history -- Related terminology -- Shortcomings of spreadsheets and relations -- OLAP versus OLTP --
2. Fundamental concepts -- Cubes -- Dimensions -- Facts -- Measures -- Relational representations -- Star schemas -- Snowflake schemas -- Data warehouses and data marts -- Multidimensional modeling processes -- Analysis and querying -- Roll-up, drill-down, and drill-out -- Slicing and dicing -- Drill-across -- Pivot tables -- Ranking -- Multidimensional querying in MDX and SQL -- Graphical querying and visualisations -- Summarizing example -- Exercises --
3. Advanced concepts -- Slowly changing dimensions -- The problem -- Solutions -- Other special kinds of dimensions -- Minidimensions -- Outriggers -- Degenerate dimensions -- Junk dimensions -- Time dimensions -- Data quality dimensions -- Advanced hierarchies -- Parent-child hierarchies -- Unbalanced hierarchies -- Non-covering hierarchies -- Non-strict hierarchies -- Multiple hierarchies and parallel hierarchies -- Summarizability -- Summarizing example -- Exercises --
4. Implementation issues -- Materialized views -- Indexing -- Indexing overview -- Bitmap indices -- Join indices -- Query processing -- OLAP implementations -- Extract-transform-load -- Exercises --
5. Further readings -- Background readings -- Advanced topics -- Software resources -- References -- Authors' biographies -- Index
Abstract freely available; full-text restricted to subscribers or individual document purchasers
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Mode of access: World Wide Web
System requirements: Adobe Acrobat Reader
The present book's subject is multidimensional data models and data modeling concepts as they are applied in real data warehouses. The book aims to present the most important concepts within this subject in a precise and understandable manner. The book's coverage of fundamental concepts includes data cubes and their elements, such as dimensions, facts, and measures and their representation in a relational setting; it includes architecture-related concepts; and it includes the querying of multidimensional databases. The book also covers advanced multidimensional concepts that are considered to be particularly important. This coverage includes advanced dimension-related concepts such as slowly changing dimensions, degenerate and junk dimensions, outriggers, parent-child hierarchies, and unbalanced, non-covering, and non-strict hierarchies. The book offers a principled overview of key implementation techniques that are particularly important to multidimensional databases, including materialized views, bitmap indices, join indices, and star join processing. The book ends with a chapter that presents the literature on which the book is based and offers further readings for those readers who wish to engage in more in-depth study of specific aspects of the book's subject
Also available in print
Morgan-IISLIB
主題 Multidimensional databases
Data warehousing
multidimensional database
multidimensional model
data warehouse
data cube
dimension
dimension hierarchy
multidimensional fact and measure
star schema
relational OLAP
SQL
MDX
complex dimension
materialized view
bitmap index
join index
Alt Author Pedersen, Torben Bach
Thomsen, Christian, 1979-
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