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ITD 256Database Concepts

Lecture 01

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Agenda

• Introduction• Database Management

• Syllabus

•

Blackboard Use• MySQL Overview

• List Problem

• Class Exercise

• What’s Next?

• Project Phase 1 Signup

• Quiz

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Agenda


• Syllabus

•


• List Problem

• Class Exercise

• What’s Next?


• Quiz

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Introduction

• Name / Nickname

• Academic Plans / Major

•Professional Goals / Career

• Databases Experience

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Introduction

• Career Advice

– Sooner than later

–

“Career” not a job – Current & future high demand

– Compensation

– Job Security

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Agenda


• Syllabus

•


• List Problem

• Class Exercise

• What’s Next?


• Quiz

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Agenda


• Syllabus

•


• List Problem

• Class Exercise

• What’s Next?


• Quiz

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Syllabus

• Refer to the Syllabus Handout

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Agenda


• Syllabus

•


• List Problem

• Class Exercise

• What’s Next?


• Quiz

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Blackboard

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Agenda


• Syllabus

•


• List Problem

• Class Exercise

• What’s Next?


• Quiz

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MySQL Overview

• http://dev.mysql.com/downloads/

• MySQL Installer

•

MySQL Workbench

• Installation instructions posted on BlackBoard

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MySQL Overview

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Agenda


• Syllabus

•


• List Problem

• Class Exercise

• What’s Next?


• Quiz

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List Problem

•

Data – Raw and unorganized facts

• Information – Processed and organized facts

•Database (non-technical term) – System to store data and provide information

• Personal Databases – Keep track of information

– Text/CSV files, Excel, MS Access• Enterprise Databases

– Integral part of Information Systems

– SQL Server, mySQL, Oracle, Teradata, DB2, etc.

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List Problem

• Student List in a Spreadsheet

– Common operations?

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List Problem

• Add Advisor Data

– Delete Data

– Change Data

– Insert Data

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List Problem

• Modification Problem

– Cause of problem?

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List Problem

• Student with Residence List

– Why no modification problem?

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List Problem

•List problems identified in the late 1960s – INSERT causes NULL values

– DELETE removes too much information

– UPDATE causes “Data Anomalies” when allredundant data changes are not made correctly

• Relational Model

– Single themed related tables

– Databases provide data independence overfile processing models like excel, text, etc.

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List Problem

– So what is the solution?

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List Problem

– Identify the themes

– Identify columns of each table

– Identify rows data of each table

–Identify Parent & Child tables

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List Problem

– Create & populate single themed tables

– Identify unique identifiers in each table

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List Problem

– Which table gets the LINK and WHY?

• Place Parents nonrepeating link in Child table

• Tables linked on AdviserLastName

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List Problem

– Is AdvisorLastName the best choice?

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List Problem

• Unique ID

– Unique ID columns ensure unique identifying

number

– Unique ID columns added to link related tables

– Linking column is always placed in child table

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List Problem

• Modification problem solved

– No UPDATE issues

– No INSERT issues

– No DELETE issues

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List Problem

•Another example with 3 themes

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List Problem

•Which table(s) get the linking fields and why?

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List Problem

How many students are advised by Shawna’s Dept?

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List Problem

• Difficulties in processing tables

– Managing tables

– Jumping from table to table

• Structured Query Language (SQL)

– Developed in the 1980s

– Universal Database sublanguage

– Used for all Data Definitions & Manipulations

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Agenda

•Introduction

• Database Management

• Syllabus

•


• List Problem

• Class Exercise

• What’s Next?


• Quiz

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Exercise

• _________ is/are organized and processed facts.

• _________ is/are raw, unorganized, and unprocessed facts.

• Databases provide _________ over file processing models.

• _________ modification problem removes too muchinformation.

• _________ occurs when all redundant data updates are notmade correctly

• _________ modification problem causes NULL values.

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Agenda

•Introduction

• Database Management

• Syllabus

•


• List Problem

• Class Exercise

• What’s Next?


• Quiz

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What’s Next?

• Locate Labs at Annandale Campus

– Open Labs in CT Building

– ITD256 Lab in Class

• Locate Labs in Loudoun Waddell Building

– Open Lab in LW230

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What’s Next?

• Purchase textbook

– Optional but recommended

• Download & Install MySQL

– Installer

– Workbench

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HW 1

1. Figure above shows a list that is used by a veterinary office. Give examples of three

modification problems that are likely to occur when using this list. (3pts)

2. Break the list in figure above into two tables, each with data for a single theme. Assume

that owners have a unique OwnerEmail and pets have unique PetName column. Indicate the

unique identifiers and linking column. (5pts)3. Describe how the tables you created in Q2 solves the problems you identified in Q1. (3pts)

4. Why is it a bad idea to assume PetName as a unique identifier? (2pts)

5. What is the difference between data and information? (2pts)

6. How is relational model better than traditional file processing? (2pts)

7. Describe in your own words how relationships between single themed tables arerepresented in a relational database. (2pts)

8. Define the term database. (2pts)

9. What is a DBMS? (2pts)

10. Define the term “Data Anomaly” and give an example. (2pts)

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Agenda

•

Introduction• Database Management

• Syllabus

•


• List Problem

• Class Exercise

• What’s Next?


• Quiz

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Agenda

•

Introduction• Database Management

• Syllabus

•


• List Problem

• Class Exercise

• What’s Next?


• Quiz

Q i E i

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Quiz Exercise

• Identify the themes in list

• Break the themes into respective tables

• Determine unique identifiers in each table

• Determine PARENT and CHILD tables

• Place Parent's identifier as link in Child table

• Draw & Populate the two tables showing all data

EmpID

EmpFirst

EmpLast

MngrFirst

MngrLast

MngrID

22

Robert

Smith

James

Knight

2

11

Kevin

Brown

James

Knight

2

44

Alec

Stewart

Albert

Hudson

1

55

John

Charles

James

Knight

2

33

Rodney

Marsh

Albert

Hudson

1

Q i E i

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Quiz Exercise

• Identify the themes in list

EMPLOYEEMANAGER





•Draw & Populate the two tables showing all data

EmpID

EmpFirst

EmpLast

MngrFirst

MngrLast

MngrID

22

Robert

Smith

James

Knight

2

11

Kevin

Brown

James

Knight

2

44

Alec

Stewart

Albert

Hudson

1

55

John

Charles

James

Knight

2

33

Rodney

Marsh

Albert

Hudson

1

Q i E i

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Quiz Exercise


EMPLOYEE (EmpID, EmpFirst, EmpLast)

MANAGER (MngrFirst, MngrLast, MngrID)





EmpID

EmpFirst

EmpLast

MngrFirst

MngrLast

MngrID

22

Robert

Smith

James

Knight

2

11

Kevin

Brown

James

Knight

2

44

Alec

Stewart

Albert

Hudson

1

55

John

Charles

James

Knight

2

33

Rodney

Marsh

Albert

Hudson

1

Quiz Exercise

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Quiz Exercise


EMPLOYEE (EmpID, EmpFirst, EmpLast)





EmpID

EmpFirst

EmpLast

MngrFirst

MngrLast

MngrID

22

Robert

Smith

James

Knight

2

11

Kevin

Brown

James

Knight

2

44

Alec

Stewart

Albert

Hudson

1

55

John

Charles

James

Knight

2

33

Rodney

Marsh

Albert

Hudson

1

Quiz Exercise

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Quiz Exercise


EMPLOYEE (EmpID, EmpFirst, EmpLast, “ MngrID”)



EmpID

EmpFirst

EmpLast

MngrFirst

MngrLast

MngrID

22

Robert

Smith

James

Knight

2

11

Kevin

Brown

James

Knight

2

44

Alec

Stewart

Albert

Hudson

1

55

John

Charles

James

Knight

2

33

Rodney

Marsh

Albert

Hudson

1

Quiz Exercise

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Quiz Exercise

EMPLOYEE (EmpID, EmpFirst, EmpLast, “ MngrID”)


EmpID

EmpFirst

EmpLast

MngrFirst

MngrLast

MngrID

22

Robert

Smith

James

Knight

2

11

Kevin

Brown

James

Knight

2

44

Alec

Stewart

Albert

Hudson

1

55

John

Charles

James

Knight

2

33

Rodney

Marsh

Albert

Hudson

1

EmpID

EmpFirst

EmpLast

MngrID

22

Robert

Smith

2

11

Kevin

Brown

2

44

Alec

Stewart

1

55

John

Charles

2

33

Rodney

Marsh

1

MngrFirst

MngrLast

MngrID

James

Knight

2

itd 256 01

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