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Chapter10 Database Management by Mind Map: Chapter10
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Chapter10 Database Management

Databases, Data, and Information


Collection of data organized in a manner that allows access, retrieval, and use of that data


Collection of unprocessed items -Text,Numbers,Images,Audio,Video


Processed data -Documents,Audio,Images,Video

The Hierarchy of Data




data file

Maintaining Data

File maintenancerefers to the procedures that keep data current

File Processing Versus Databases

File processing system

•Each department has its own set of files

•Used for many years

•Have data redundancy

•Isolate data

Database approach

•Programs and users share data

•Reduce data redundancy

•Improve data integrity

•Share data

•Allows easier access

•Reduces development time

•Can be more vulnerable

Database Management Systems

A DMBS provides a variety of techniques to restore the database to a usable form in case it is damaged or destroyed

Relational, Object‐Oriented, and Multidimensional Databases

A relational databasestores data in tablesthat consist of rows and columns

An object‐oriented database (OODB) stores data in objects

A multidimensional database can store data in more than two dimensions of data –Sometimes known as a hypercube,Can consolidate data much faster than a relational database

Web Databases

Shop for products or services

Buy or sell stocks

Search for a job

Make airline reservations

Register for college classes

Check semester grades

Database Administration

Creates and maintains the data dictionary, manages security, monitors performance, and checks backup and recovery procedures