The success of a project can be severely be impacted if each of the key components is not planned out carefully and correctly. For more and more projects these days, a database is one of these key components. The database, while always given attention, is often not given the full planning that it deserves. This lack of planning at the beginning of a project could potentially lead to additional difficulties for the development team or result in limitation in both functionality and performance once the project is completed. To help with the planning of a database their exists a number of tools and methodologies, many of them follow the plans outlined by Dr. Peter Pin-Shan Chen and use the Entity-Relationship Model as their basis.
Dr. Peter Pin-Shan Chen first presented the Entity-Relationship (E-R) Model in March of 1976, in a widely read paper entitled, “The Entity-Relationship Model – Toward a Unified View of Data”. In this paper Dr. Chen proposed merging three other models, the Network model, the Relational Model, and the Entity Set Model into a single system which could take advantage of the best of all three. (Chen, 1976) This new unified model would be comprised of a number of Entities, which would be defined as a person, a place, an object, or some type of event for which the database is being designed to track and maintain. It is important to understand and note that entity definitions may not be well defined across any entire company as one department could easily define a term different depending upon their point of view. For this reason it is a good idea to ensure that these entities are well defined and that they are not used incorrectly. Entities can have a number of Attributes associated with them as additi...
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...inking and the Enhanced Entity-Relationship (EER) Model was created to expand the E-R Model. The EER added a number of new useful concepts that more accurately described the modeled data of this new age. Many other concepts and features have been incorporated into this model, which will continue to grow and adjust as the data that is being modeled adjusts and changes. At its heart however will remain the basic features put forth as the Entity-Relationship Model.
Works Cited
Chen, P. (1976). The entity-relationship model - toward a unified view of data. ACM Transactions on Database Systems, 1(1), Retrieved from http://www.csc.lsu.edu/news/erd.pdf
Witt, G. (1997, August). Is data modeling standing still?. Database Programming & Design, 64 . Retrieved from http://go.galegroup.com.portal.lib.fit.edu/ps/i.do?&id=GALE|A19690038&v=2.1&u=mel b26933&it=r&p=CDB&sw=w
Researcher Mark Knapp is best-known for describing and developing a 10 step model of relational stages, it explains how relationships come together and how they come apart (Alder, pg 287). I decided to take one of my past relationships with an ex-boyfriend of mine through Mark Knapp's relational stages model. I will be referring to my ex-boyfriend as Johnny throughout this paper.
To help the company get back on track, the following three ERP modules are recommended as a start for the company. These modules will help the company integrate data across its plant sites, generate
Oracle ThinkQuest. Oracle Education Foundation, 04 Jun 2010. Web.
Some faculties and departments are already using Oracle applications in their day-to-day operations. As time goes by, more and more information users will be working with an application based on Oracle database technology. If you get the opportunity to be a member of an application development team, you will become familiar with the workings of Oracle and relational databases. Other users may have to learn about this popular database management system through their own experience. This article is for our readers who, as of yet, have no access to Oracle databases but have a yearning for learning what they're all about.
In 1977, Larry Ellison, Bob Miner, and Ed Oates founded System Development Laboratories. After being inspired by a research paper written in 1970 by an IBM researcher titled “A Relational Model of Data for Large Shared Data Banks” they decided to build a new type of database called a relational database system. The original project on the relational database system was for the government (Central Intelligence Agency) and was dubbed ‘Oracle.’ They thought this would be appropriate because the meaning of Oracle is source of wisdom.
Relationships between two people can have a strong bond and through poetry can have an everlasting life. The relationship can be between a mother and a child, a man and a woman, or of one person reaching out to their love. No matter what kind of relationship there is, the bond between the two people is shown through literary devices to enhance the romantic impression upon the reader. Through Dudley Randall’s “Ballad of Birmingham,” Ben Jonson’s “To Celia,” and William Shakespeare’s “Shall I Compare Thee to a Summer’s Day?” relationships are viewed as a powerful bond, an everlasting love, and even a romantic hymn.
It was August 2008, and my normal walk home from school did not feel so normal. Today was the day that after four long years of being in foster care, I would find out if I would finally be adopted. those four years were full of court trials and visits with people I did not know and I had no desire to. The adoption process takes so long because the authorities knew nothing about me, but they got to decide if the parents I chose were “fit” to be my parents. For my Relationship Analysis Paper I will discuss how the theoretical and conceptual approaches; self esteem, Knapp's model of relationship states, and social penetration theory go
ERP is a business system that joins all the aspects in the business world such as planning, manufacturing, sales and marketing, projects. The ERP has become more popular in the software which used to help the business actives including order tracking, customer service, finance, inventory control and human resources. The ERP databases contain all the data about the business whi...
[7] Elmasri & Navathe. Fundamentals of database systems, 4th edition. Addison-Wesley, Redwood City, CA. 2004.
- Scheer, A, Habermann, F, 2000, "Making ERP a success", Communications of the ACM, 43 , 3, 57-61.
Inconsistently storing organization data creates a lot of issues, a poor database design can cause security, integrity and normalization related issues. Majority of these issues are due to redundancy and weak data integrity and irregular storage, it is an ongoing challenge for every organization and it is important for organization and DBA to build logical, conceptual and efficient design for database. In today’s complex database systems Normalization, Data Integrity and security plays a key role. Normalization as design approach helps to minimize data redundancy and optimizes data structure by systematically and properly placing data in to appropriate groupings, a successful normalize designed follows “First Normalization Flow”, “Second Normalization Flow” and “Third Normalization flow”. Data integrity helps to increase accuracy and consistency of data over its entire life cycle, it also help keep track of database objects and ensure that each object is created, formatted and maintained properly. It is critical aspect of database design which involves “Database Structure Integrity” and “Semantic data Integrity”. Database Security is another high priority and critical issue for every organization, data breaches continue to dominate business and IT, building a secure system is as much important like Normalization and Data Integrity. Secure system helps to protect data from unauthorized users, data masking and data encryption are preferred technology used by DBA to protect data.
An entity class is a class used to show the information and associated behaviour that must be stored. Entity objects are used to hold and update information about some phenomenon, such as an event, a person, or some real-life object. They are usually persistent, having attributes and relationships ne...
[1]- Ralph Stair, George Reynolds and Thomas Chesney. 2012. Fundamentals of Business information systems. 2nd edition: Cengage Learning EMEA.
“From early on the ambition of ERP-systems has been used to integrate all transaction systems within the one system which combines all information and practices across full organisation, and gives proper information for decision-making in real-time” (Bjorn-Andersen & Johansson 2007)
What's e-business? It is the transformation of every business process through using the internet and associated technologies. In this transformation, each part of the business becomes a part of an intrinsic network, which enables employees, suppliers and customers of a given enterprise to conduct their tasks. People usually try to make a point in differing e-business from e-commence, but as I see, e-commerce is a part of the e-business category, and an important one.