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Data Model for Oracle User Groups 
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A. The requirement is to design a Database to support the activities of Oracle User Groups

Subject: Oracle ERD

Question: Below is the problem ..

I have the ERD started just looking for some guidance Our regional Oracle User's Group has grown to include over 200 members. 

We are an all-volunteer organization of working adults and secondary-school students, and our records are a mess. 

We need an information system to help us keep track of our business. 

We definitely need to automate our membership records. For each member, we need to keep the member's name, title, mailing address, 
office or home phone number, type of membership (individual or corporate), and whether or not the member is has paid the dues 
(is the member current ?). 

We collect dues on a yearly basis, and they are due in January. 

We also like to know which company a member works for but keeping this information current is difficult because our members are 
always changing companies. 

We try to track only a single current employer for each member. 

Our members come from many different companies, including Sony, EG&G, and Storage Tech.s. 

A few of our members are unemployed. For each company, we keep the company name, address, and type of business.

We have a standard set business codes. 

We keep only the main company address for each company. 

We hold various events during the year, and we'd like to track information about each event. 

Some of our annual events include the September Meeting, the November Meeting, the annual Training Day in January, and our April Meeting. 

We also hold special events each year. 

For example, we held a special CASE (Computer Aided Systems Engineering) day last May, and Richard Barker from Oracle U.K. came and spoke. 

We hold our events at several different locations around town, including AT&T, Redrocks Community College, and Skyline University. 

We'd like to track each event's date, optional description of the event, number of attendees, where it was held, how much money we spent on it, 
and any comments on the event. 

We treat all comments as if they came from an anonymous submitter. A set of comments is a free-form text statement of any length. 

We number each set of comments, and we frequently get multiple sets of comments for an event. 

We also track which members attended which events. 

Some of our members are really active, and others attend very infrequently or just enjoy receiving our newsletter. 

We also need to track what type of computer platforms our members are using. 

We have a unique, three-digit system identification tag for each type of platform. 

For example, 001 is for UNIX; 002 is for RAC & HA; 003 is for Oracle on Windows; 020 is for Oracle Spatial; 030 is for Oracle & .NET; 
050 is for DBMS; and 080 is for Business Intelligence & Reporting Tools. 

We also like to track which application areas each member is interested in. 

Sample application areas include accounting, human resources, entertainment, oil and gas, pharmaceuticals and health systems. 

The applications should be portable, so we don't need to know which platforms they run on.
Barry says the Things of Interest are :- A.1 Applications A.2 Application Areas A.3 Comments A.4 Dues A.5 Employer Companies A.6 Events A.7 Events Attendees A.8 Events Speakers A.9 Members A.10 newsletters A.11 Platforms A.12 User Groups B. How are they related ? B.1 An Event can be a Birth, Death or Marriage. B.2 A Parent can register one or many Events. B.3 Others to be determined.

Barry Williams
May 27th. 2011
Principal Consultant
Database Answers


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