sorts of people need access to companies’ databases. In addition to a company’s own employees‚ these include the company’s customers‚ potential customers‚ suppliers‚ and vendors of all types. It is possible for a company to have all of its databases concentrated at one mainframe computer site with worldwide access to this site provided by telecommunications networks‚ including the Internet. Although the management of such a centralized system and its databases can be controlled in a well-contained manner
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Brief Introduction to Database Concepts Andrea Rodr´ ıguez Summer School - Castell´n 2004 o Department of Computer Science University of Concepci´n‚ Chile o http://www.inf.udec.cl/∼andrea andrea@udec.cl 1 Introduction Information and data are different. Information is understood by a person. Data are values stored on a passive medium like a computer disk. The purpose of a database management system (DBMS) is to bridge the gap between information and data - the data stored in memory or on disk
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Week 3 Determining Databases and Data CommunicationsBIS 320 Week 3 Determining Databases and Data CommunicationsScenario 1: If I were a marketing assistant for a consumer electronic company and I had to set-up my company’s booth at the tradeshow. I would be need to be extremely detailed in packing up equipment and components. The cost of this technology is extremely expensive and it is my responsibility and my job on the line. When technology companies do tradeshows there are a wide variety of equipment
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demand for materials used in producing plastic products is very important towards Riordan’s development. To develop the current materials ordering system‚ a database plan is necessary for the use in Business-to-Business websites that will allow Riordan to order materials via the web from its vendors. This database plan will assist Riordan with ordering materials online from its vendors‚ increase its annual revenue and stay competitive. Database Plan Description The database plan is the first step
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The Fundamentals of Database Design To end up with a good ‘relational database’ application‚ you need to ask: Do I actually need one? If so‚ how far do you want to take it? By this I mean‚ is this to be a simple database to store information about only one‚ or very few‚ related entities (i.e. a list of people who attended a certain event‚ and how they came to hear about the event) which are not likely to change; or a permanent and well used application with several different entities (i.e.
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“A database is a tool for collecting and organizing information ("Database Basics"‚ 2012).” This is the simplest definition of a database. A database can take many different forms‚ it can be an address book‚ a box of recipes‚ even a collection of business cards. For the purposes of this paper I will be referring to a database as the electronic version found on a computer‚ such as Microsoft Access. A database is made up of a collection of tables. These tables can be linked together to allow a user
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Determining Databases and Data Communications BIS 320 University of Phoenix Instructor: Cornell Perry In this paper the writer will seek to respond to the questions designated for both scenarios. This paper will list typical fields for each type of data. Provide an example of two relationships that you need to track. This paper will also answer the questions of: Do you need a database system? If not‚ can Excel® handle the data and the output? What are the advantages and disadvantages
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Overview of Database Concepts TRUE/FALSE 1. A database is a physical storage device for data. ANS: F PTS: 1 REF: 2 2. A field is a basic unit of data also referred to as a record. ANS: F PTS: 1 REF: 3 3. A character is a basic unit of data and can consist of a number‚ letter‚ or special symbol. ANS: T PTS: 1 REF: 3 4. A collection of fields is a file. ANS: F PTS: 1 REF: 3 5. A collection of records is a file. ANS: T PTS: 1 REF: 3 6. A field in the logical design of a database corresponds
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STELLA MARIS COLLEGE - DEPARTMENT OF COMPUTER SCIENCE DB34 - Database Management Systems UNIT I : Advantages and Components of a Database Management Systems - Feasibility Study - Class Diagrams - Data Types –Architecture- Events - Normal Forms - Integrity – EER model - Converting Class Diagrams to Normalized Tables - Data Dictionary. UNIT II : Query Basics - Computation Using Queries - Subtotals and GROUP BY Command - Queries with Multiple Tables - Subqueries - Joins - DDL & DML - Testing
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Normalization of Database Tables Database Tables and Normalization * Normalization is a process for assigning attributes to entities. It reduces data redundancies and helps eliminate the data anomalies. * Normalization works through a series of stages called normal forms: * First normal form (1NF) * Second normal form (2NF) * Third normal form (3NF) * Fourth normal form (4NF) * The highest level of normalization is not always desirable. * The Need
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