SIT772 - Database and Information Retrieval

WEEK 1. INTRODUCTION

Administrative Information

WEEK 1. INTRODUCTION 2

OutlineAdministration Information

Session 01. Introduction

◦ Concepts of Data Modelling

◦ Concepts of Database Technology

◦ Tools and techniques to create a Database Design and Implementation project

◦ Use the SQL language for Relational Database development

◦ Understand methods for capturing, representing, storing, organising, and retrieving data

◦ Gain experience in the development of structured, unstructured or loosely structured information

◦ Large Data Analytics and NoSQL

WEEK 1. INTRODUCTION 3

Administrative InformationUnit Staff:

WEEK 1. INTRODUCTION 4

Ms Thao Pham

Coordinator for Week 1 to Week 7

Campus:

Room:

Telephone:

Fax:

Email:

Burwood Campus

T2.04.4

Internal: 17486 / National: 03-9251-7486

Internal: 46440 / National: 03-9244-6440

thao.pham@deakin.edu.au

Dr Michael Hobbs

Unit Chair and Coordinator for Week8 to Week 11

Campus:

Telephone:

Fax:

Email:

Geelong Campus at Waurn Ponds

Internal: 73342 / National: 03-5227-3342

Internal: 72028 / National: 03-5227-2028

m.hobbs@deakin.edu.au

Administrative InformationUnit Materials:

◦ No prescribed texts

◦ The recommended Textbook (for):

◦ The database part of this unit

● CARLOS CORONEL, STEVEN MORRIS, Database Systems: Design, Implementation, and Management, 11th edition, Cengage Learning.

◦ The information retrieval part of this unit, the related materials will be provided in CloudDeakinResources module.

◦ Reference textbooks:

● Thomas Connolly, Carolyn Begg, Database Systems: A practical approach to Design, Implementation, and Management, 5th edition, Pearson.

● Ricardo Baeza-Yates, Berthier Ribeiro-Neto, Modern Information Retrieval, Addison-Wesley.

Additional references will be posted on CloudDeakin from time to time under the Resources module

WEEK 1. INTRODUCTION 5

Administrative InformationUnit Materials:

◦ CloudDeakin

◦ Should check often (at least twice a week)

◦ Contains:

◦ Unit Guide (read this first!)

◦ News, e.g., content updates, changed due dates/requirements, etc.

◦ Discussion forums

◦ Administrative information

◦ Lecture slides and recordings

◦ Weekly exercises and solutions

◦ Assessments

◦ Bb Collaborate

WEEK 1. INTRODUCTION 6

TimetableLecture

Wednesday 13:00 - 14:00 LT 6 (B.4.12)

Practical

Wednesday 14:00 - 15:50 B.4.06

Bb Collaborate

- Date and time will be arrange via Unit Site discussion on CloudDeakin

PASS

Wednesday 11:00 - 11:50 Y.1.20

WEEK 1. INTRODUCTION 7

Teaching and LearningStudents should

◦ pay attention

◦ make notes

◦ listen for important information

◦ ask questions

◦ think

◦ study 10 hours per week (average)

- 3 hrs at University, 3 hrs read textbook & other resources & summary, 2hrs practices, 2 hrs assignment

- Campus: 1 x 1 hour class per week, 1 x 2 hour practical per week.

- Cloud (online): Learning experiences are via CloudDeakin. Students will have the opportunity to participate in online consultation sessions.

Notes:

Students will on average spend 150 hours over the trimester on learning and assessment activities in this unit.

WEEK 1. INTRODUCTION 8

Administrative InformationThis is an individual assessment task.

20% – Assignment 1 (9:00am, Monday, 16 January 2017)◦ Database Design and Implementation.

◦ A written report on the design and implementation of a small database project, together with SQL scripts.

20% – Assignment 2 (9:00am, Monday, 30 January 2017)◦ Information Retrieval Techniques. This is an individual assessment task

◦ Written answers to a number of Information Retrieval questions.

◦ Late submissions penalised as per Faculty regulations

◦ See CloudDeakin for further information including submission instructions

◦ Results will be return within 10 working days

60% – Final Examination

There are no hurdles to pass this unit, you only need to achieve a final mark of 50 / 100 or more

WEEK 1. INTRODUCTION 9

Administrative InformationPlagiarism:

◦ Plagiarism is the copying of another person’s ideas or expressions without appropriate acknowledgment and presenting these ideas or forms of expression as your own.

◦ It includes not only written works such as books or journals but data or images that may be presented in tables, diagrams, designs, plans, photographs, film, music, formulae, web sites and computer programs.

◦ Plagiarism also includes the use of (or passing off) the work of lecturers or other students as your own.

WEEK 1. INTRODUCTION 10

Administrative InformationPlagiarism (cont.)

◦ Please be aware that if the Faculty Academic Progress and Discipline Committee finds a student has committed an act of academic misconduct (plagiarism and/or exam cheating) it may impose one or more of the following penalties:

◦ A reprimand;

◦ A fine not exceeding $500;

◦ Allocated a zero mark in the relevant task or such other mark as is appropriate;

◦ Allocate a zero mark in the relevant unit or such other mark as is appropriate;

◦ Allocate a zero mark in such other units in which the student is enrolled as the Faculty Academic Progress and University Discipline Committee may determine;

◦ Suspend the student for up to one year;

◦ Exclude the student for a minimum period of one year.

WEEK 1. INTRODUCTION 11

Unit Weekly Activities

1. Introduction

2. Data Modelling

3. Entity Relationship Modelling

4. Normalization

5. Relational Algebra

6. The Relational Database and SQL

7. Introduction to SQL & SQL*Plus

8. Information Retrieval

9. Statistical Properties of Text and Boolean Model

10. Vector Model and IR Evaluation

11. Relevance Feedback, Unit Review

WEEK 1. INTRODUCTION 12

Some Final Thoughts

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The unit follows a carefully planned progression.

You are strongly encouraged to attend/study lectures!

Practical

Laboratories

Assignments

& Exam

Lecture

Sessions

WEEK 1. INTRODUCTION 14

WEEK 1.Introduction Databases andDBMS

Outline• Different between Data and Information

• What is Database

• Various Types of Databases

• Important of Database Design

• Components of Database System (DBS)

• Main Functions of Database Management System (DBMS)

WEEK 1. INTRODUCTION 15

Why Databases

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• Did you use

– Google to search for required information on the Web?

– a credit card to buy something?

– Log on to CloudDeakin?

– Access Enrolled unit site?

– your bank card to withdraw money from an ATM?

– library catalogues to look for books?

– Etc.

• Are these transactions possible without a database?

Why Databases

WEEK 1. INTRODUCTION 17

• Virtually all modern business systems

rely on databases.

• It is vital for any IS professional to have a good understanding of how databases are:

– created

– used

Why Databases

WEEK 1. INTRODUCTION 18

� Databases are:

◦ specialized structures

◦ allow computer-based systems to store, manage and retrieve data quickly.

� Various Types of Databases

◦ Single-user Database

◦ Desktop Database

◦ Multiuser Database

◦ Workgroup Database

◦ Enterprise Database

◦ Centralised Database

◦ Distributed Database

Data VS. Information

WEEK 1. INTRODUCTION 19

Data Information

• Raw facts

– Raw data - Not yet

been processed to

reveal the meaning

• Building blocks of

information

• Data management

– Data generation, storage,

and retrieval

• Produced by processing data

• Reveals the meaning of data

• Enables knowledge

creation

• Should be accurate,

relevant, and timely to

enable good decision

making

WEEK 1. INTRODUCTION 20

Data VS. Information

• Unit report (data or information?)

• Unit profile (data or information?)

Student_ID Name Major Result

8912345 Lewis,A.D. MG 66

9023456 Baker, G. P. CS 82

9134567 Hunter, S. L. IS 76

9145678 Grant, G. D CS 90

… … … …

Grade % No. of Students

HD 12 15

D 17.6 22

C 28.8 36

P 31.2 39

N 10.4 13

WEEK 1. INTRODUCTION 21

What is a Database?

• A shared, integrated

computer structure

that stores a collection of:

– End user data

(raw facts)

– Meta-data

(data about data)

WEEK 1. INTRODUCTION 22

Types of Databases

User Type Single-user, Multi-user

Size Desktop, Workgroup, Enterprise

Location Centralised, Distributed, Cloud

Data Usage Operational (a.k.a. transactional or production), Data

Data Type General-purpose, Discipline-specific

Data Structure Structured, Semi-structured, Unstructured

New Type NoSQL (Not only SQL), not the traditional database, to handle (e.g. social media on theInternet)

- Unprecedented volume of data

- Variety of data types and structures

- Velocity of data operations

WEEK 1. INTRODUCTION 23

What is a DBMS?

• DBMS = Database Management System

• A collection of programs that

– manage database structures;

– control access to data;

– facilitate the sharing of data among multiple users

and applications;

– enable efficient and effective data management.

• DB ~ e-filing cabinet

• DBMS helps manage the cabinet’s contents

WEEK 1. INTRODUCTION 24

The Benefits of DBMSThe DBMS manages the interaction between the

end user and the database

WEEK 1. INTRODUCTION 25

The Benefits of DBMS

• The end users will have better access to data

• How is this done?

– DBMS provides an integrated view to data and operations

– It reduces data inconsistencies and errors

– Enables ad-hoc queries

WEEK 1. INTRODUCTION 26

Functions of DBMS

• Performs functions that guarantee integrity and

consistency of data

WEEK 1. INTRODUCTION 27

The DBS Environment

WEEK 1. INTRODUCTION 28

Why Database Design?

• Focuses on the database structurethat will be used to store and managedata

• A database that meets all userrequirements does not just happen;its structure must be designedcarefully

• An easy-to-use DBMS does not meana good database design

WEEK 1. INTRODUCTION 29

Why Database Design?

• Even a good DBMS will performpoorly with a bad DB design

• Defines the database’s expected use

• General goals of DB design

– Avoid redundancy

– Provide efficient but controlled access to

data

– Enable a fast response to a query

WEEK 1. INTRODUCTION 30

Database Career Opportunities

WEEK 1. INTRODUCTION 31

Review Questions

• Describe each of the following:

– Data

– Information

– Database

– DBMS

– Database System Environment

• What are the DBMS functions, and why are they important?

• Why is database design so important?

• What are the problems of a computer file system?