Get Advanced data warehouse design : from conventional to PDF

By Elzbieta Malinowski

ISBN-10: 3540744045

ISBN-13: 9783540744047

ISBN-10: 3540744053

ISBN-13: 9783540744054

This unparalleled paintings offers readers with an creation to the state of the art learn on info warehouse layout, with many references to extra precise resources. It deals a transparent and a concise presentation of the foremost recommendations and leads to the topic region. Malinowski and Zimányi clarify traditional facts warehouse layout intimately, and also tackle cutting edge domain names lately brought to increase the functions of information warehouse structures: specifically, the administration of spatial and temporal information.

Show description

Read Online or Download Advanced data warehouse design : from conventional to spatial and temporal applications PDF

Similar information systems books

Essentials of Management Information Systems (10th Edition) by Kenneth Laudon, Jane Laudon PDF

An in-depth examine how today's companies use details technologies.

Many companies search for applicants who know the way to exploit details platforms, creating a basic figuring out of data platforms an asset to any company expert. Laudon and Laudon proceed to stress how company targets form the appliance of latest details platforms and technologies.

The 10th variation positive aspects new establishing, last, and Interactive consultation situations, in addition to up-to-date textual content, figures, tables, and instances.

Download e-book for iPad: Encyclopedia of Physical Science and Technology - Quantum by Robert Allen Meyers (Editor)

9 years has handed because the 1992 moment version of the encyclopedia was once released. This thoroughly revised 3rd version, that is a school point compendium of chemistry, molecular biology, arithmetic, and engineering, is refreshed with a number of articles approximately present study in those fields.

Get Handbook of Research on Enterprise Systems Volume 1 PDF

The development of computing and conversation applied sciences have profoundly speeded up the improvement and deployment of advanced company platforms, growing an significance in its implementation throughout company and business companies around the globe. The instruction manual of study on company platforms addresses the sphere of company platforms with extra breadth and intensity than the other source, overlaying innovative applied sciences, major theories, and complicated functions.

Read e-book online Geographic Information Systems: Socioeconomic Applications PDF

This moment version of Geographic details platforms builds at the strengths of the 1st, and comprises vital contemporary advances in GIS improvement and significant new socioeconomic datasets together with new census information. Martin offers an available creation to the historical past, rules and methods of GIS, with a special concentrate on socioeconomic functions.

Additional info for Advanced data warehouse design : from conventional to spatial and temporal applications

Example text

In order to define the third normal form, we must define one additional concept: • A dependency X → Z is transitive if there is a set of attributes Y such that the dependencies X → Y and Y → Z hold. Now we can give the definition of the third normal form: A relation is in the third normal form if it is in the second normal form and there are no transitive dependencies between a key and a nonprime attribute. The table Assistant above is not in the third normal form, since there is a transitive dependency from Employee no to Advisor id, and from Advisor id to Advisor first name, Advisor last name, and Advisor email.

5 is an additive measure: it can be summarized when the hierarchies in the Store, Time, and Product dimensions are traversed. • Semiadditive measures (also called stock or level measures) can be meaningfully summarized using addition along some, but not all, dimensions. A typical example is that of inventory quantities. These can be aggregated in the Store dimension in Fig. 6 The Multidimensional Model 47 or a city, but cannot be aggregated in the Time dimension, for instance by adding the inventory quantities for two different quarters.

When a multiplecolumn index is created, the order of columns in the index has an impact on data retrieval. Generally, the most restrictive value should be placed first for optimum performance. Another categorization of indexes is according to whether they are unique or nonunique: unique indexes do not allow duplicate values, while this is not the case for nonunique indexes. In addition, an index can be sparse or dense: a sparse index has index records for only some of the search values in the file, while a dense index has an index record for every search value in the file.

Download PDF sample

Advanced data warehouse design : from conventional to spatial and temporal applications by Elzbieta Malinowski


by Steven
4.5

Rated 4.59 of 5 – based on 28 votes