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IS1106

Week 3

TermDefinition
Database Self describing collection of logically related data that is organised to meet the information needs of multiple users
Advantages of Databases Data is integrated and stored centrally Analysis Capability Data is programme independent
Metadata stored in data dictionary Describes each piece of data in a business and describes in detail the characteristics of the data
DBMS Database Management System
Structure of Relational DSMS Represents data as two dimensional tables Each table contains data on entities and their attributes
Types of Databases Operational databases Data warehouse databases Data marts Personal Databases Distributed Databases External Databases
Operational databases Store detailed data needed to support the operations of the entire organization
Data Warehouse Databases Store data from current and previous years that has been extracted from various operational and management databases of the organization
Data Marts Subset of the data included in the data warehouse which focus on specific aspects of the company
Personal Databases Developed by end-users at their workstations
Distributed Databases Databases of local workshops and departments at regional offices etc.
External Databases Privately generated and owned online databases or data banks that specialize in a particular area of interest.
Golden Rule Centralise where possible; Distribute where necessary
Created by: peadarbailey1206
 

 



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