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Fundamentals of Database Systems

Fundamentals Of Database Systems

Authors:
Elmasri Navathe
Exercise:
Review Questions
Chapter:
And Database Users
Edition:
7
ISBN:
9780133970777
Question:
1

 

Question

Define the following terms: data, database, DBMS, database system, database catalog, program-data independence, user view, DBA, end user, canned transaction, deductive database system, persistent object, meta-data, and transaction-processing application.

Answer

Definitions of following terms:

Data: Data is a relative entity or object. Ex-name, age, class..

Database: A Database is a collection of related data with an implicit meaning.

DBMS: A database management system is a software system that helps users to create and maintains a database. This system contains the processes of defining, constructing, manipulating and sharing databases from various users and applications.

Database System: Data base system is nothing but database and DBMS software together we call as data base system.

Database catalog: Database catalog contains information such as the structure of each file, the type and storage format of each data item and various constraints on the data.

Program-data independence: The structure of data files is stored in the DBMS catalog separately from the access programs is known as program – data independence.

User view: It is the view that may be a subset of the database or it contains virtual data is derived from the database files but is not explicitly stored.

DBA: Database Administrator is an administrator who is responsible for authorizing access to the database.DBA manages and coordinates the resources and acquires software and hardware resources.

End-user: An end user is a person whose job requires access to the database for querying, updating and generating the reports.

Canned transaction: The main aim of canned transaction is using standard types of queries and updates for querying and updating database.

Deductive database systems: This type of database systems provides capability for defining deduction rules for new information from the stored database.

Persistent object: Persistent means object is stored permanently in an object –oriented DBMS and it survives to terminate the program execution and then retrieved directly by another program.

Meta-data: It is information about structure of each file, type and storage format of each data and various constraints on the data is called meta-data.

Transaction-processing application: This application is designed to maintain database integrity in a known, consistent state.

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