CS181 Introduction to Database and the WebClass hour: 9:55AM-10:45AM MWF.Hyer Hall 210

Course Objectives

• Create databases, tables, queries, forms and write reports using RDBMS

• Develop and publish web sites using HTML, and CSS.

Textbook/Technology requirement

Textbook:1. HTML for the World Wide Web with XHTML and CSS. Elizabeth Castro. 2003. Peachpit Press.2. Special Edition Using Microsoft Access 2002. Roger Jennings. 2002. Que Press.

Software:Microsoft Access

Introduction

Tell me about yourself and what you expect to get out from this course

Self-Introduction• Recently graduated from the

University of Connecticut (05 Class), Ph.D in Computer Science and Engineering

• Bachelor of Science from Hanoi University of Technology (86-91)

• Master of Computer Science from UW-Milwaukee (96-99)

Self-Introduction

• Research Experience:– User Modeling, Information Retrieval,

Decision Theory, Collaborative Filtering, Human Factors

• Teaching Experience:– CS181, 271, 172 Fall 05 at UWW– Introduction courses at UOP and Devry– TA for Computer Architecture, OO Design,

Compiler, Artificial Intelligence

Self-Introduction

• Teaching philosophy:– Interactive– Adaptive– Pro-active– Collaborative

• Other hobbies (non-academic related)– Movies– College Basketball– Family activities

Contact information

nguyenh@uww.edu

Baker Hall 324

Office Hours: 2:15-4:15pm, MWF or by appointment

262 472 5170

Course detail - Topics

Develop simple three tier application

Database (back-end)

HTML & Java script(front-end)

Connecting these two together

Course detail - Evaluation

GRADABLE POINTS WEIGHTING

Project 1 300 30%

Project 2 200 20%

Midterm 200 20%

Final exam 300 30%

Totals 1000 100%

What does it take to success

• Hard working, well-organization, pay attention to detail

• Participate in the class discussion

• Practice, practice, practice!!!

Questions?

Introduction to Database and Database Design

Introduction to Database

• Why are databases important?

• How do databases represent information?

• Who works with databases?

• How do databases support the World Wide Web?

• What database concepts and terms do you need to know?

Why Are Databases Important?

• Importance to business– Walmart: Records of retail business

• Size of warehouses• Size of inventory• Average sales per $ of inventory

– Amazon.com: Records of customers

• Importance to Web– Records of interactions/transactions– Example of auction site, customers’s

preferences/behaviors

Importance of Databases to Economy

• Expanding use of databases in retail sales– Walmart, retail sales information tracking

• Examples of analyses– Sales of items

• Comparisons between daily totals of items sold and items in inventory; seasonal variations in sales of specific and similar items; relative sales of similar items with different features

– Market-basket collections (all items in a single purchase)• Average and variation in total purchase amount/number & price

of items.• Correlation between sales of items in a single purchase

– Customer analysis• Behavior of average customer• Preferences of individual customers

How Do Databases Represent Information?

• The physical database:– a collection of files containing the data content

• The schema: – a specification of the physical database’s information content

and logical structure

• The database engine: – software that lets people access and modify the database

contents

• The data definition and manipulation languages: – programming languages, such as Java or SQL (Structured

Query Language), that let software developers define the schema and access the database

How Do Databases Represent Information?

• Relational database management system (RDBMS)– Tables of data– Schema

• Name of table• Names and types of attributes

– Contents• Row is a fact• Attribute value is a characteristic

Example of storing information of a department

Department table

Dept Manager Description

101 017-11-0031

Marketing

102 018-21-2131

Accounting

103 019-41-1231

Customer service

Schema Depts(dept,manager,description)

Table creation statement

create table depts(dept char(3), manager char(11), description char(25))

Example of storing information of a department

Insert data into table

insert into depts (dept, manager,description)

values ('001','017-11-0031',‘marketing');

Practice

• Open Microsoft Access

• Name your database as Example

• Create a new table “By Design View” named Department with 2 fields:– Dept: text (3 characters)- Manager: text (11 characters)- Description: text (100 characters)

Who Works with Database Systems?

• Database designers

• Applications developers

• Web-application developers

• Web-site designers

• Database administrators

How Do Databases Support the World Wide Web?

• Maintain information that is published in the site• Track the ways in which site visitors use that

information• Track the number of site visitors and customers• Store information collected from input forms

such as requests for customer addresses• Store the structure and content of Web pages

Information Systems

• Three separate types of functionality:– Data Management– Application logic– Presentation

Single-tier architecture

• All functionality combined into a single tier (e.g mainframe where users access through dumb terminal or stand-alone machine where there is no server)

• Pros: easy maintenance and administration

• Cons: missing GUI, single point failure

Client-server architecture

• Thin client– Client implements only the GUI– Server implements business logic

and data management

• Pros: easy maintenance and implementation

• Cons:can’t separate between business logic and data management

Client-server architecture

• Thick client– Client implements both GUI and

business logic– Server implements data

management

• Cons: no central place to update the business logic– Security: trust clients– Scalability: problems with 100s of

clients

Three tier architecture

Presentationtier

Middle tier

Data management tier

Client program

Database server

Application server

Three tier architecture• Pros:

– Heterogeneous systems– Thin clients– Integrated data access– Scalability– Development:

• Code for business logic is centralized• Interaction between tiers through well-

defined APIs.

Timeline for Database Systems Developments

• before 1960 transition from punched card and tape• 1960s, from file management to databases• 1970s, CODASYL and Relational Model

– Codd (IBM) Relational Model– Chen introduced Entity Relationship Model– Query languages developed (SQL)

• 1980s, Client/Server DBs, Oracle, DB2• 1990s, web-based information delivery

– Trends: expert DBs, object DBs, distributed DBs• 2000s, Enhancing database technology for Web

storage and access– Bioinformatics: genetic and protein information,

medical records– Using the Web as a database

Questions?