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Database overview. Information in a db The transformation of raw data into organized tables of information … indexed by unique keys … supporting rapid.

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Presentation on theme: "Database overview. Information in a db The transformation of raw data into organized tables of information … indexed by unique keys … supporting rapid."— Presentation transcript:

1 Database overview

2 Information in a db The transformation of raw data into organized tables of information … indexed by unique keys … supporting rapid updates and boolean queries

3 Key terms Primary key Secondary key Foreign key Attributes Normalization Typical operations – select, join

4 normalization 1NF- eliminate duplicate columns establish primary key 2NF - remove sub-grouped data establish foreign key 3NF - remove data not fully dependent on primary key 4NF - remove multi-valued dependencies

5 … working examples Set up database examples Set up JSP/Servlet sample code –Download Tomcat and MySQL –Set up web site to demo the code –Set up mysql server to access through WAN

6 Download and Installation notes >> >> http://www.coreservlets.com/Apache- Tomcat-Tutorial/http://www.coreservlets.com/Apache- Tomcat-Tutorial/ http://dev.mysql.com/doc/

7 Database Schema –Non-Chargeable Calling Card >>>> –Rechargeable Calling Card >>>> –The difference: active_card (patronID, rechargeDate) JSP/Servlet Sample Application >>>>

8 Based on the current E-Z Pass model ER Diagram >>>> Notes –Tag is not necessary tied to one vehicle –Need additional tables for Agency, Plaza, and Lane information.


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