Topic 1 : Database Systems
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.