Relational Database

Hilda Widyastuti

Semester 1/2014-2015

Informatic Technique Study Program, Batam State Polytechnic

Overview

What is database ?

What is database system?

WHAT IS DATABASE ?

Database illustration (filling cabinet)

Database illustration (filling cabinet)

What can you do with filling cabinet ?

Store file on folder

Give numbering with certain pattern

Another activity? Another activity?

Introduction to databaseData

* facts or information used usually to calculate, analyze, or plan something

* information that is produced or stored by a computer

Base

something (such as a group of people or things) that provides support for a place, business, etc.

Database

a usually large collection of data organized especially for rapid search and retrieval (as by a computer)

Database (DB) Operation

Create DB

Drop DBCreate table

Drop Query Update

Drop table

Query Update

Delete

Database Objectives

Speed Save, manipulate, and retrieve data easily

Space Efficiency

Reduce redundancy use relation

Accuracy Use data constraint, unique dataAccuracy Use data constraint, unique data

Availability Available to be accessed

Completeness If DB is not complete, we can add data or

data structure

Security User management

Sharability Many users can share DB

Database Application Sample

Reservation

Inventory

Customer care

Banking, etc

WHAT IS DATABASE SYSTEM?

Database System

System : a group of related parts that move or work together

Database system contains hardware, operating system, database, DBMS, user, another software

Example :

DBMS

Software that uses a standard method of cataloging, retrieving, and running queries on data.

Manages incoming data, organizes it, and provides ways for the data to be modified or extracted by users or other programs

Example : MySQL, PostgreSQL, Microsoft Access, SQL Server, Oracle, etc

Relational Database (RDB) Concept

collective set of multiple data sets organized by tables, records and columns.

establish a well-defined relationship between database tables

tables communicate and share information, which facilitates data searchability, which facilitates data searchability, organization and reporting

use structured query language (SQL)

RDB is derived from the mathematical function concept of mapping data sets

Relational Database Sample

References

1. Fathansyah, 2012, Basis data edisi Revisi, Penerbit Informatika.

2. Gerakansadararsip.wordpress.com

3. Gelaskosongku.blogspot.com

4. http://www.merriam-webster.com

5. www.techterms.com

6. http://www.techopedia.com

7. http://en.wikipedia.org/wiki/Database

Task 1

Create small group (3 person)

Discuss a database system in real world. Identify their components, include :

Description (diagram)

Hardware and operating system Hardware and operating system

Tables in database

DBMS

User

Other software involved

Homework (individual)

1. What is Entity Relationship (ER) model?

2. What is entity definition?

3. What is attribute definition?

a. Give sample about simple attribute and a composite attribute

b. Give sample about single valued attribute and b. Give sample about single valued attribute and multi valued attribute

c. Give sample about derived attribute

4. What is primary key?

5. What is relationship definition?

Homework (individual)

6. Explain 4 types of relationship :

a. one-to-one

b. one-to-many

c. many-to-one

d. many-to-many

7. Make illustration to describe 4 types of relationship 7. Make illustration to describe 4 types of relationship in question 6 !

Write or type your answer in a paper and submit to your teacher next week!

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