Database overview

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

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

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

… 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

Download and Installation notes >> >> Tomcat-Tutorial/ Tomcat-Tutorial/

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

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.