Modern Database Management systems edition 8-answers ch1

Modern Database Management systems edition 8-answers ch1 -...

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Modern Database Management systems edition 8: Chapter 1 Answers to Review Questions 1. Define each of the following key terms: a. Data . Stored representations of objects and events that have meaning and importance in the user’s environment. b. Information . Data that have been processed in such a way that they can increase the knowledge of the person who uses it. c. Metadata . Data that describes the properties or characteristics of end-user data and the context of that data. d. Database application . An application program (or set of related programs) that is used to perform a series of database activities (create, read, update, and delete) on behalf of database users. e. Data warehouse . An integrated decision support database whose content is derived from the various operational databases. f. Constraint. A rule that cannot be violated by database users. g. Database . An organized collection of logically related data. h. Entity A person, place, object, event, or concept in the user environment about which the organization wishes to maintain data. i. Database management system. A software system that is used to create, maintain, and provide controlled access to user databases. 2. Match the following terms and definitions: c data b   database application l   constraint  g   repository f   metadata m  data warehouse a   information
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j   user view k database management system h   data independence e   database enterprise resource systems planning (ERP) d enterprise data model 3. Contrast the following terms: a. Data dependence; data independence . With data dependence, data descriptions are included with the application programs that use the data, while with data independence the data descriptions are separated from the application programs. b. Data warehouse; data mining . A data warehouse is an integrated decision support database, while data mining (described in the chapter introduction) is the process of extracting useful information from databases. c. Data; information . Data consist of facts, text, and other multimedia objects, while information is data that have been processed in such a way that it can increase the knowledge of the person who uses it. d. Repository; database . A repository is a centralized storehouse for all data definitions, data relationships, and other system components, while a database is an organized collection of logically related data. e. Entity; enterprise data model . An entity is an object or concept that is important to the business, while an enterprise data model is a graphical model that shows the high-level entities for the organization and the relationship among those entities. f.
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Modern Database Management systems edition 8-answers ch1 -...

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