are working on their degree. * Each graduate student has another‚ more senior graduate student (known as a student advisor) who advises him or her on what courses to take. * Design and draw an ER diagram that captures the information about the university. Use only the basic ER model here; that is‚ entities‚ relationships‚ and attributes. Be sure to indicate any key and participation constraints. Exercise 2. Notown Records has decided to store information about musicians who perform
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Entity Relationship Diagram - ERD Database – is a large data repository that stores a shared collection of logically data. A database can be modeled as: A collection of entities and relationship among entities. What is Entity Relationship Diagram? An entity-relationship (ER) diagram is a specialized graphic diagram that illustrates the relationships between entities in a database‚ simply it illustrates the logical structure of databases. ER diagrams often use symbols to represent different types
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Exercise 1 1. Draw an E-R diagram for each of the following situations (if you believe that you need to make additional assumptions‚ clearly state them for each situation): a. A hospital has a large number of registered physicians. Attributes of PHYSICIAN include Physician_ID (the identifier) and Specialty. Patients are admitted to the hospital by physicians. Attributes of PATIENT include Patient__ID (the identifier) and Patient_Name. Any patient who is admitted must have exactly one admitting
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International Journal of Innovation‚ Management and Technology‚ Vol. 3‚ No. 5‚ October 2012 Investigating Online Shopping System in Iran as a Developing Country B. Zibanezhad‚ M. Makhlughian‚ and A. Salajegheh Abstract—The lack of necessary reliable infrastructures in developing countries has reduced electronic commerce growth and development. Online shopping system analysis and design was evaluated in Iran as a developing country. National banking & delivery systems along with cultural & training
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New Er Digram for BIOIn software engineering‚ an entity–relationship model (ER model) is a data model for describing the data or information aspects of a business domain or its process requirements‚ in an abstract way that lends itself to ultimately being implemented in a database such as a relational database. The main components of ER models are entities (things) and the relationships that can exist among them. Entity-relationship modeling was developed by Peter Chen and published in a 1976 paper
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manipulate information. ICT is a combination of information technology and communications technology. In an increasingly interconnected world‚ the interactions among devices‚ systems‚ and people are growing rapidly. Businesses need to meet the demands of their employees and customers to allow for greater access to systems and information. All of these communications needs must be delivered in a unified way. By offering a scalable infrastructure‚ cloud computing models enable companies to work
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CREDIT CARD SALES SYSTEM The main entities of a Credit Card Sales System are: 1. Customer 2. Orders 3. Order Details 4. Bank 5. Retailer The main relationships among entities of a credit card sales System are: 1. Customer places an order. 2. Order contains order details. 3. An Order detail has a product. 4. Bank completes the payment. The main assumptions in a Credit Card Sale System are: 1. The Customer and the Retailer have an account in the same
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method for buying and selling books. On campus bookstore is popular among students in book purchase‚ but for most sellers the medium of internet is most preferred medium for selling. Background of the Problem The main purpose of the project study is to explain the increase in popularity of internet based Used Books sales with respect to the methods of transactions that provide these medium a leading edge over others. Online Website for Used Books Bookstore projects had a primary aim of using digitization
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I. INTRODUCTION Bookstores may be either part of a chain‚ or local independent bookstores. They can range in size offering from several hundred to several hundred thousands of titles. They may be brick-and-mortar stores or internet only stores or a combination of both. Sizes for the larger bookstores exceed half a million titles. Bookstores often sell other printed matter besides books‚ such as newspapers‚ magazines and maps; additional product lines may vary enormously‚ particularly among independent
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and explain a Use-Case diagram for a Library Management System. Introduction: Capturing the dynamic behaviour of a system is one the key aspects to create a model. Dynamic behaviour means the behaviour of the system under operation. Use case diagrams are used in Unified Modeling Language‚ a standard modelling language for the modeling of real-world objects and systems. A use case diagram is to explicitly define the working of a system with in a system boundary. Each system is primarily divided into
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