Database Systems

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created 4 years ago by Christine_Enderle
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1

Data

Raw facts, or facts that have not yet been processed to reveal their meaning to the end user.

2

Ad hoc query

A "spur of the moment" question

3

Analytical database

a database focused primarily on storing historical data and business metrics used exclusively for tactical or strategic decision making

4

business intelligence

A comprehensive, cohesive and integrated set of tools and processes used to capture, collect, integrate, store, and analyze data with the purpose of generating and presenting information to support business decision making.

5

centralized database

a database located at a single site

6

cloud database

a database that is created and maintained using cloud services, such as Microsoft Azure or Amazon's AWS.

7

data anomaly

inconsistent changes have been made to a database. For example, an employee moves, but the address change is not corrected in all files in the database.

8

data dependence

a data condition in which data representation and manipulation are dependent on the physical data storage characteristics.

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data dictionary

contains the data definition as well as their characteristics and relationships.

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data inconsistency

a condition in which different versions of the same data yield different inconsistent results

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data independence

a condition in which data access is unaffected by changes in physical data storage characteristics.

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data integrity

in a relational database, a condition in which the data in the database comply with all entity and referential integrity constraints.

13

data management

a process that focuses on data collection, storage, and retrieval. Common data management functions include addition, deletion, modification, and listing

14

data processing specialist (DP)

the person that makes the databases

15

data quality

a comprehensive approach to ensuring the accuracy, validity, and timeliness of data

16

data redundancy

a condition in which a data environment contains redundant ,unnecessarily duplicated, data

17

data warehouse

an integrated subject-oriented, time variant, nonvolatile collection of data that provides support for decision making.

18

database

a shared, integrated computer structure that house a collection of related data.

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database design

the process that yields the description of the database structure and determines the database components.

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database management systems

The collection of programs that manages the database structure and controls access to the data stored in the database

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database system

an organization of components that defines and regulates the collection, storage, management and use of data in a database environment

22

desktop database

a single-user database that runs on a personal computer

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discipline-specific database

A database that contains data focused on specific subject areas

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distributed database

a logically related database that is stored in two or more physically independent sites

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enterprise database

the overall company data representation which provides support for present and expected future needs

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extensible markup language (xml)

a metalanguage used to represent and manipulate data elements.

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field

an alphabetic or numeric character or group of characters that defines a characteristic of a perons, place or thing.

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File

a Named collection of related records

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general-purpose database

a database that contains a wide variety of data used in multiple disciplines for example a census database that contains general demographic data.

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information

The result of processing raw data to reveal its meaning.

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islands of information

in the old file system environment, pool of independent often duplicated and inconsistent data created and managed by different departments

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knowledge

the body of information and facts about a specific subject.

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logical data format

the way a person views data

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metadata

data about data. that is, data about data characteristics and relationships

35

multi-user database NoSQL

a database that supports multiple concurrent users

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online analytical processing (OLAP)

Decision support system tools that use multidimensional data analysis techniques to help in decision making, business modeling and operations research

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online transaction processing database (oltp)

the system that support a company's day to day operations.

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operational database

a database designed primarily to support a company's day to day operations.

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performance tuning

activities that make a database perform more efficiently in terms of storage and access speed

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physical data format

the way a computer "sees" data

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production database

the main database designed to keep track of the day to day operations of a company

42

query

a question or task asked by an end user of a database in the form of SQL code. a specific request for data manipulation issued by the end user or the application to the dbms

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query language

a nonprocedural language that is used by a dbms to manipulate its data.

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query result set

the collection of data rows returned by a query

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record

a collection of related logically connected fields

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semi structured data

data that have already been processed to some extent

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single-user database

a database that supports only one user at a time

48

social media

web and mobile technologies that enable "anywhere, anytime, always on" human interations

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structural dependence

a data characteristic in which a change in the database schema affect data access, thus requiring changes in all access programs.

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structural independence

a data characteristic in which changes int he database schema do not affect data access

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structured data

unstructured data that have been formatted to facilitate storage, use and information generation

52

Structured Query Language (SQL)

a powerful and flexible relational database language composed of commands that enable users to create database and table structures, perform various types of data manipulation and data administration and query the database to extract useful information

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transactional database

a database designed to keep track of the day to day transactions of an organization.

54

unstructured data

data that exist in their original raw state; that is , in the format in which they were collected

55

workgroup database

a multi user database that usually supports fewer than 50 users or is used for a specific department

56

XML database

a database system that stores and manages semi structured XML data