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Web-Database Integration Week 8 LBSC 690 Information Technology Agenda • Questions • PHP • SQL • Midterm review Ways of Generating Web Pages • Static: Written in a markup language – HTML, XML • Dynamic: Generated using a program – Common Gateway Interface (.cgi) – Java servlets • Dynamic: Generated from a database – Cold Fusion (.cfm) – PHP (.php) Why Database-Generated Pages? • Remote access to a database – Client does not need the database software • Serve rapidly changing information – e.g., Airline reservation systems • Provide multiple “access points” – By subject, by date, by author, … • Record user responses in the database Three Ways to Serve Data Microsoft Web Server Web Browser .mdb Microsoft Access Cold Fusion Server PHP-enabled Web Server mysql database mysql DBMS Data Access Pages PHP Examples • Demo 1: a “Hello World” program • Demo 2: Reading input from a form • Demo 3: Printing output from a table Structured Query Language DESCRIBE Flight; Structured Query Language SELECT * FROM Flight; Structured Query Language SELECT Company.CompanyName, Company.CompanyPhone, Flight.Origin, Flight.DepartureTime FROM Flight,Company WHERE Flight.CompanyName=Company.CompanyName AND Flight.AvailableSeats>3; The mysql DBMS mysql –u dbname –h host –p password show databases; use RentAPlane; show tables; describe Flight; select * from Flight; insert into … Cold Fusion <HTML> <HEAD> <TITLE>Show All Students in Our School</TITLE> <CFQUERY NAME=“allStudents” DATASOURCE=“student20”> SELECT * FROM Students </CFQUERY> Must be the same name </HEAD> <BODY BGCOLOR="LIGHTBLUE"> <H2> <B>All Students in Our School</B> </H2> <BR> <hr> <pre> studentID FirstName MiddleName LastName<br></pre> <CFOUTPUT QUERY="allStudents"> CF variables <PRE> #studentID# #FirstName# #MiddleName# #LastName# </PRE> </CFOUTPUT> <FORM ACTION="mainMenu.cfm" Method="post"> <input type="submit" value="Main Menu"> </FORM> </BODY> </HTML> SQL in ColdFusion • Show who borrowed which book <CFQUERY name="borrowedBook" dataSource="student20"> SELECT Books.Title, Students.FirstName, Students.MiddleName, Students.LastName, Checkout.DueDate FROM Books, Students, Checkout WHERE Books.BookID=Checkout.BookID AND Students.StudentID=Checkout.StudentID; </CFQUERY> The Grand Plan Computers Networks Interaction XML Communication Multimedia Web Quiz Programming Search Midterm Databases Policy Project Web Databases Life Cycle Final The Midterm • Quiz/homework should be good preparation – A variety of question types – Some questions will require computer use • Lots of prior exams are available – Many have solutions available • Open book/notes/Internet/mind/… – Just don’t get help from another person Computer Systems • Hardware – Types of hardware – Storage hierarchy – Moore’s law • Software – Types of software – Types of interfaces Networks • Types of Networks – LAN, WAN, Internet, Wireless • Packet Switching – Ethernet, routers, routing tables • Layered Architecture and protocols – TCP/UDP – IP address/domain name • Encryption Structured Documents • The Web – HTTP, HTML, URL • XML My Browser Multimedia • Compression, compression, compression – – – – Image: lossy vs loseless Video: frames are alike Speech: voice predictable Music: masking • Streaming Buffer Media Sever Internet Human-Computer Interaction • Input and output devices • Mental models • Interaction styles – Direct manipulation, menus, command line Programming • Programming languages – Machines require low-level specific instructions – Humans require high-level abstraction • Can create any behavior from 3 control structures – Sequential execution – Conditional – Iteration • Javascript interpreters are in Web browsers Databases • Structured information – Field->record->table->database – Primary key • Normalized tables (relations) – Remove redundancy, inconsistency, error – Easy update, search • Join links tables together – Through foreign key • Access provides visual operations Web-Database Integration • Access “Data Access Pages” • PHP • SQL
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