Topic 1 : Database Systems. Point #1 Data Data are raw facts Unprocessed, thus, no meaning.

Topic 1 : Database Systems

Point #1

Data Data are raw facts Unprocessed, thus, no meaning

Information Processed Data: reveals different

meaning If we are given accurate, relevant

and timely information, we are able to create good decisions.

Knowledge and Wisdom!

Data->Information->Decision Data constitutes the building blocks of

information Information is produced by processing

data Information is used to reveal the meaning

of the data Accurate, Relevant and timely information

is the key to good decision making Good decision making is the key to

organizational survival in the global environment

As an IM student… We MANAGE INFORMATION. We collect the data, able to process

the data accurately to create useful information

Thus, you should learn how to manage these chunks of information

A system used is databasing.

Point #2

What is a Database?

A Database is a shared, integrated computer structure that stores a collection of

1.End-user data: RAW DATA2.MetaData

What is a Meta data?

Provide a description of the data characteristics and the set of relationships that link the data found within the database.

A database… A database resembles a very-organized

electronic filing cabinet in which a powereful software, known as a database management system, helps manage the cabinet’s

A Database Management System (DBMS) is a collection of programs that manage the database structure and controls access to the data stored in the database.

An information system is a system that collects and stores data

Data we need to manage: Supermarket – invemtory & checkout Credit card – purchases & cash

advance Automated teller machines – deposits,

withdrawals & balance inquiry Travel agent – booking, reservation &

ticketing Library – catalog, loans & returns Insurance – customer information University – student information

Databases and Information Systems

DatabaseManagement

System(DBMS)

Decisionsupportsystems

Managementinformation

systems

Transactionprocessing

systems

Strategic Databases

Management

Databases

Transaction Databases

“Information Resources Management”

Steps Involved in Converting Data to Information

ACQUISITION

STORAGE

MANIPULATION

RETRIEVAL

DISTRIBUTION

DATA INFORMATION

• software package/ system to facilitate the creation and maintenance of a computerized database.

• It defines (data types, structures, constraints) construct (storing data on some storage medium controlled by DBMS) and manipulate (querying, update, report generation) databases for various applications.

What is a database management system (DBMS)?

Use of Database

Improved data sharing Better data integration Minimize data inconsistency and

redundancy Improved data access.