Got a tricky question? Receive an answer from students like you! Try us!

Relational Database Design - Assignment Example

Author : samanthadeckow
Download 1

Summary

This paper describes the process of creating a relational database. It includes the SQL code (MySQL) for creating the tables, the joins to create the necessary relationships and the results of those SQL runs. It describes the specifications of the proposed system, the logic of that system, the table definitions and contents, a live transaction which inserts data and one that deletes it and finally a non-trivial query which demonstrates multiple joins, group functions, qualifiers and correlation variables.

Extract of sample
Relational Database Design

A many-to-one relationship must be made between the Session table ( a group of the Lecture table and the Practical table) and the Module table. The Lecture table and the Practical table are both join tables which allow the necessary one to many relationship with the Tutor table and the Session table and the many-to-many relationship between Tutor and Session table. A one-to-many relationship should be constructed between the Tutor table and the Lecture table. Finally, a many-to-many relationship between the table Tutor and the table Practical must be created. The versions of MySQL used for this exercise the relationship of many entities to many must be made through an outer join, represented by the join table. This is displayed in the figure below in paragraph 2.b. These specifications have been duplicated in the attached appendices with the required SQL code.
a. The schematic describing the logical data model is illustrated in paragraph 2. b. below. ...
Download paper

Related Essays

Object Database Management System
There are two most important factors that lead users to implement object database technology. Firstly, relational databases turn out to be cumbersome to use with composite data. Secondly, data is usually operated by application software written using object-oriented programming languages such as C+, Java, Delphi and C#, and the code required translating between this demonstration of the data and the tuples of a relational database can be dreary to write, and prolonged to execute. This variance between the models used to represent information in the application programs and the database is…
9 pages (2259 words)
Database Technology
Object oriented databases have now become very popular as they provide a greater degree of flexibility in data storage and also provide a resource efficient storage mechanism. The data storage in the object oriented databases is in the form of objects instead of storing as rows and columns.…
13 pages (3263 words)
Object Relational Database
In ORDB, reusability is achieved by using the techniques of inheritance of types and polymorphism. Every record has unique identity within the object table. Here every record is termed to be active, persistent objects encapsulating both data and methods. The only way to access any data, is through the object methods.…
12 pages (3012 words)
Database Design
Furthermore, the information model comprises of the customer and the details of the meter including the intricate technical details as well as the maintenance schedules apart from the measurements that quantify for billing. This is necessary for the effective management of the information system and conduct regular checks on the meters in order to prevent errors in the readings leading to unwanted reconciliations for the organization.…
14 pages (3514 words)
Database
Inspectors have a unique inspector number, and the details of their name and position are held on record. Products are identified by their name and records of the product type and a description of the product are kept.…
4 pages (1004 words)