E-R Diagram Introduction:- In 1976 ‚Chen developed the Entity-Relationship Diagrams ‚a high-level data model that is useful in developing a conceptual design for database . An ER diagram is a diagram containing entities or “items”‚ relationships among them‚ and attributes of the entities . The E-R model is one of the best known tools for logical database design. Within the database community‚ it is considered a natural and easy-to-understand way of conceptualizing the structure of database.
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1. What is an Entity Relationship Diagram? An entity relationship diagram is a graphical representation of an organisation’s data storage requirements. Entity relationship diagrams are abstractions of the real world which simplify the problem to be solved while retaining its essential features. Entity relationship diagrams are used to: identify the data that must be captured‚ stored and retrieved in order to support the business activities performed by an organisation; and identify the data required
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Exercises 9 address driver-id person name owns license model year car report-number location date driver participated accident damage-amount Figure 2.1 E-R diagram for a Car-insurance company. Exercises 2.1 Explain the distinctions among the terms primary key‚ candidate key‚ and superkey. Answer: A superkey is a set of one or more attributes that‚ taken collectively‚ allows us to identify uniquely an entity in the entity set. A superkey may contain extraneous attributes
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2013 Week 4 Problems and Exercises Chapter 7 5) Consider the E-R diagram in Figure 7-20. Based on this E-R diagram‚ answer the following questions: a. How many EMPLOYEES can work on a project? There is no set limit of employees to work on one given project. b. What is the degree of the Used on relationship? There are 2 degrees for the Used on relationship. c. Do any associative entities appear in this diagram? If so‚ name them. Yes there is task which is an associative entity.
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Table of Contents 1. Introduction 3 2. What’s the Difference between e-Business and e-Commerce? 3 3. Who is FedEx? 4 4. Ebusiness at FedEx 5 4.1. E-Operations at FedEx 5 4.2. E- Human Resources Management (HRM) at FedEx 8 4.3. E- Marketing at FedEx 9 4.4. E-Commerce at FedEx 11 5. How does E-Business increase market share at FedEx? 11 6. How has e-technology lead to augmentation of earnings at FedEx? 13 10. The e-Business Strategy – What are the Risks? How do you mitigate these? 15 11
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service unveiled by FedEx TELECOMWORLDWIRE-17 November 2009-SenseAware information service unveiled by FedEx(C)1994-2009 M2 COMMUNICATIONS http://www.m2.com Transportation‚ e-commerce and business services provider FedEx Corp (NYSE:FDX) announced on Tuesday the introduction of SenseAware powered by FedEx‚ a next generation information service that combines a GPS sensor device and a web-based collaboration platform. According to the company‚ the solution‚ developed by the FedEx innovation team‚ is
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FedEx Corporation Operating Segments and Companies Basically‚ FedEx is divided into four segments and 11 operating companies. The segments consist of FedEx Express Segment‚ FedEx Ground Segment‚ FedEx Freight Segment‚ and FedEx Freight Segment. The 4 segments and 11 operating companies are as shown chart below: FedEx Services Segment FedEx Freight Segment FedEx Ground Segment FedEx Express Segment FedEx Services FedEx Freight FedEx Ground FedEx Express FedEx Global Supply Chain Services
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...TO THE PEOPLE OF GOD (AND THE PEOPLE I LOVE) Christians talk a lot about premarital sex. And I think that’s a mistake. I don’t think it’s a mistake because the issue is unimportant but because the grammar is skewed. The word “fornication” is almost gone from contemporary Christian speech. It sounds creepy and antiquated. Instead‚ we talk about “abstinence” and “premarital sex.” In the most recent issue of Touchstone magazine‚ I argue that the loss of the words “fornicate” and “fornication”
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Chapter 4 The Enhanced E-R Model and Business Rules Chapter Objectives The purpose of this chapter is to present some important extensions to the E-R model (described in Chapter 3) that are useful in capturing additional business meaning. In particular we describe two types of extensions to the E-R model. The enhanced entity-relationship (EER) model includes constructs for supertype/subtype relationships. The inclusion of new notation for business rules allows the designer to capture
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e-Business Model‚ Venn Diagram Technology Application and e-Marketing – MKT552 February 18‚ 2013 Howard Kersey Introduction The e-Business sector is seeing tremendous growth at a time when technology is the lifeline for many people. Online business models are used to convert new technology to economic value. For some start-up companies‚ familiar business models cannot be applied‚ so a new model must be devised to fit the vision for the new entity. Not only is the business model important
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