DATA, DATABASE, DBMS, DBMS SOFTWARE, RELATION, APPLICATION, ENVIRONMENT, BENEFITS.

Week 8

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DATA

Definition : data is defined as facts and statistics collected together for reference or analysis.

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DATABASE

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• Database : Database is a collection of information stored in an organized form in a computer.

• Database program : Database program is a software tool for organizing storage and retrieval of that information.

• File: A file is a collection of related information.• Record: A Record is the information relating to

one person, product, or event. Or • Record: Each discrete chunk of information in a

record is called a field

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DATABASE OPERATIONS

1. Browsing2. Database Queries3. Sorting Data4. Printing Reports, Labels and Form Letters

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RELATIONAL DATABASE

Definition : Relational Database program is

one that allows files to be related to each other so that changes in one file are reflected in other files automatically.

Relations are the type of table interconnections.

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TYPES OF RELATIONSHIP

1. One-to-many relationship2. Many-to-one relationship3. One-to-one relationship4. Many-to-many relationship

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ONE-TO-MANY RELATIONSHIP

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MANY-TO-ONE RELATIONSHIP

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ONE-TO-ONE RELATIONSHIP

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MANY-TO-MANY RELATIONSHIP

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DATA MINING AND RELATIONAL DATABASE

Data mining is the extracting of the relevant data from all the sources of data.

A relational database is the study of

algorithms for searching and processing information in documents and databases; closely related to information retrieval.

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APPLICATIONS OF DATABASE• Airlines and railways• Banking sector• Education• Telecommunications• Credit card transactions• E-commerce• Health care information systems and electronic patient

record• Digital libraries and digital publishing• Finance(stock market)• Sales• Human resources

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ENVIRONMENT

General Purpose: Users perform a variety of database tasks, ranging from simple transactions to complex queries. Select this database environment for general purpose usage.

Software Only: Allows you to install software components without creating a database.

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 BENEFITS OF DATABASE

1. Reduced data redundancy 2. Reduced updating errors and increased consistency 3. Greater data integrity and independence from

applications programs 4. Improved data access to users through use of host

and query languages 5. Improved data security 6. Reduced data entry, storage, and retrieval costs 7. Facilitated development of new applications

program

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SESSION 8 END

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