Here is the assignment that I need help on: Design an OO schema for a database application that you

Aug 17th, 2016
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Here is the assignment that I need help on: Design an OO schema for a database application that you are interested in. Construct an EER schema for the application, and then create the corresponding classes in ODL. Specify a number of methods for each class, and then specify queries in OQL for your database application.

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Answer ---------------------IntroductionDevelopers using an object-relational database management system (ORDBMS) get the mostbenefit from this technology when taking a more "holistic" approach to database analysis anddesign than is typical with relational DBMS technology.Traditionally, relational dbmss are viewed as efficient, reliable, and relatively staticrepositories for business data. SQL-92 provides a flexible framework for storing facts aboutinteresting real-world situations, and a mechanism for manipulating the data recording thesefacts. But there are many things that SQL's simplicity make difficult for developers toachieve. For example, try to answer the following simple question using SQL-92:"Which of my employees has a birthday this week?"Is that so hard, you ask? Well, if the calendars we actually use were as simple as SQL-92'sDATE datatype, it would be easy. But this question is complicated by the fact that peopleborn on the 29th of February celebrate birthdays every year on the 28th of February, exceptduring leap years. As a result, the SQL-92 query you need to write looks like this:Figure 1. Incomplete solution to "Whose Birthday is Today?" query in SQL-92The principle goal of object-relational DBMS technology is to enable developers to avoidcomplications like this and, in turn, create smarter databases. Later in this article we willexamine what the ORDBMS solution to this exact problem looks like. But first, we willreview a high-level develo

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