+ Connecting to the Web Week 7, Lecture A. + Midterm Basics Thursday February 28 during Class The lab Tuesday, February 26 is optional review Class on.

+

Connecting to the WebWeek 7, Lecture A

KROENKE and AUER - DATABASE CONCEPTS (6th Edition) Copyright © 2013 Pearson Education, Inc. Publishing as Prentice Hall

+Midterm Basics

Thursday February 28 during Class

The lab Tuesday, February 26 is optional review

Class on Tuesday February 26 – Review Session Come prepared with questions and topics you want to

review. Attendance sheet will be used.

+Review and Questions Topics from last lecture

Terminology

Questions?

+We Have Web Sites

What capabilities are available in a static web site (one with no DB) view pages, images, video, etc. receive information

Who is this good for? small businesses personal web sites

+We Have Web Sites

What are some advantages of good web sites? easy to use universally accessible don't need to take college courses to be able to use them Web browsers are ubiquitous, no special software needed

+We Have Web Sites

What are some DISadvantages of static Web sites? information flows in one direction each page is built individually updates require access to the files and some knowledge

+We Have Data

What can we do with our DB? we can store lots of information we can examine and analyze our information we can update our information it's robust and good at what it does

+We Have Data

What are some drawbacks of the DB? steep learning curve to do basic actions setting up accounts for each person to access it requiring special software to use it possibly limited to specific machines or networks knowledge of databases/SQL required

+Let’s put them together!

Can we get the advantages of the web and the power of a DB together?

static Web sites easy to use and universally accessible don't need to take college courses to be able to use them Web browsers are ubiquitous, no special software needed

Databases we can store lots of information we can examine and analyze our information we can update our information

+WHY would we do this?

allow web sites to be much more powerful

use web sites to collect, analyze, and share data from a DB

make user-friendly methods for people to access DB they will probably never know they are using a DB

+HOW would we do this?

what are the parts? web server database that accepts connections some type of code

types of web servers

types of databases

types of code

+HOW would we do this?

an example (www.HighlandsForum.org) MySQL (database) ColdFusion (code) Apache (Web server)

How are they working?

What are we going to use in class? Windows Server (Web server) PHP (code) SQL Server (database)

+End Lecture 7a

What do you think?

Opinions on the topic?

Questions?

+

Connecting to the WebWeek 7 Lecture B

KROENKE and AUER - DATABASE CONCEPTS (6th Edition) Copyright © 2013 Pearson Education, Inc. Publishing as Prentice Hall

+Midterm Basics

Thursday February 28 during Class

The lab Tuesday, February 26 is optional review

Class on Tuesday February 26 – Review Session Come prepared with questions and topics you want to

review. Attendance sheet will be used.

+Review and Questions Topics from last lecture

Terminology

Questions?

+Review Homework Assignment

read questions

class provides answers

discuss any difficulties or problems

+Examples of Web sites using Databases

Web page pulling data to displayconnection informationquery a tableresultsprogrammer must format the results for

displayprocessing query results row-by-row

Penn State Course Catalog

+Examples of Web sites using Databases

Web page(s) allowing the update/edit of dataconnection informationquery (update) results table data is changedprogrammer formats form data into a query

statementdatabase management system updates data

Angel (cms.psu.edu)

+Web Database Processing

+Web Database Processing

Web servers connect to Database servers

They can be on the same machine or be connecting through network/internet

+ODBC

Open DataBase Connectivity

is a standardized architecture that is the tool a Web Server can use to connect to a Database server.

will use a Database driver appropriate for the DB server

Can process, reformat or pass on SQL to DB

+Data Source Name (DSN)

File data sourcea shared file, only requires dbms driver

and access credentials

System data sourceallows one computer to connect to the

database server

User data sourceonly for the user who created it

+Data Source Name (DSN)

System Data Sourcebest choice for Web ServerAllows Web Server to create a connection

with the Database ServerUsers (browsers) requests are interpreted

by the Web ServerWeb server then makes connection to

Database Server to send queries

+Book Example

Microsoft IIS (Internet Information Server)

p. 368

instructions for setting up a web server on a windows machine

+PHP

PHP: Hypertext Processor

code is lines of text in a text document saved with a .php file extension

PHP code mingles with HTML code

+PHP

Browser requests a page with a .php extension

Web Server sees the extension and knows to read and process the page

Web Server reads the code, takes appropriate actions, then generates results

Results are sent back to the browser as HTML

+PHP

PHP pages can do many thingsprocess form resultsmathconnect to databases (select, insert,

update, delete)

Use text code to collect, manipulate, edit and use data

+PHP

+PHP

+PHP

+PHP

+PHP – Forms to Update

+Discussion

What do you think?

Opinions of all this?

+Seven weeks down 9 to go!

Next week (week 8) Mid-Term Exam One lecture of Exam Prep One lecture to take Exam No lab next week (office hour time) No Homework due next week