Exercise 1. Consider the following information about a university database: * Professors have an SSN‚ a name‚ an age‚ a rank‚ and a research specialty. * Projects have a project number‚ a sponsor name (e.g.‚ NSF)‚ a starting date‚ an ending date‚ and a budget. * Graduate students have an SSN‚ a name‚ an age‚ and a degree program (e.g.‚ M.S. or Ph.D.) * Each project is managed by one professor (known as the project’s principal inves- tigator). * Each project is worked
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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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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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National banking & delivery systems along with cultural & training challenges were evaluated too. Based on Iran governmental services constraints‚ we presented an appropriate architecture for large scale online shopping systems. Some of design phase diagrams are presented that could be useful for software developing companies. Index Terms—B2C‚ Electronic Commerce‚ Online Shopping System‚ SDLC Phases. I. INTRODUCTION As electronic services are dependent on many governmental and private organizations
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assumptions in a Credit Card Sale System are: 1. The Customer and the Retailer have an account in the same bank. 2. Instead of the grid through which all the banks are connected the payment is processed by the bank for simplicity. E-R Diagram Tables and Primary Keys Normalization Forms The three normalization forms are 1. First normal form 2. Second normal form 3. Third normal form First normal form First normal form states that there should be no repeating elements
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Bulacan State University Bustos Campus Bustos‚ Bulacan WRITTEN REPORT in SOCIAL PHILOSOPHY (ETHICAL RELATIVISM) Submitted by GROUP 1 BSED-3H Submitted to Mr. Cruz ETHICAL RELATIVISM Ethical relativism is the position that there are no moral absolutes‚ no moral right and wrongs. Instead‚ right and wrong are based on social norms. Such could be the case with "situational ethics‚" which is a category of ethical relativism. At any
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store corporate data‚ web pages‚ on-line movies‚ work flow information‚ document databases---absolutely everything that is of interest to business. This is made simpler and possible through a simple approach called entity relationship (ER) model. The ER Model The ER modelling starts with attributes. Attributes are the characteristics of an entity type that we are interested in. An attribute is a descriptor whose values are associated with individual entities of a specific type. Example the attribute
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Entity Relationship (ER) Modeling In this chapter‚ you will learn: ½ The main characteristics of entity relationship components ½ How relationships between entities are defined‚ refined‚ and incorporated into the database design process ½ How ERD components affect database design and implementation ½ That real-world database design often requires the reconciliation of conflicting goals 4 This chapter expands coverage of the data-modeling aspect of database design. Data modeling is the first
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Juan Rodriguez Dr. Sargent ENG-115-02 5 September 2014 Speech of Introduction Job: RN Nurse Night In The ER I. Introduction A. Attention Getter: What would you do if you were involve in a car accident and your family was in the car with you? But they are not just in the car. One of your family members has been taken to the emergency room. B. Thesis Statement: Well I am here to tell you I am the person for the job to take care of your love one and I will explain you why. C. Preview: Like
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