Benefits of a Database and Information-Gathering Techniques Brian Morrow Professor Cohen CIS 111 May 5‚ 2013 A database management system is a system in which data is stored‚ processed‚ and retrieved. These systems are known for security accuracy and consistency. A well-planned and developed database is very efficient and meets the current and future needs of the organization to which it services. This type of system allows the organization to collectively store and manipulate data. One key
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CHAPTER 3 DATABASES AND DATA WAREHOUSES Building Business Intelligence CONTACT INFORMATION: Stephen Haag is the primary author of this chapter. If you have any questions or comments‚ please direct them to him at shaag@du.edu. THIS CHAPTER/MODULE IN SHORT FORM… This chapter introduces your students to the vitally important role of information in an organization and the various technology tools (databases‚ DBMSs‚ data warehouses‚ and data-mining tools) that facilitate the management
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Exercises 3 (RA - TRC -DRC ) Consider the following relational database: employee(employee-name‚ street‚ city) works(employee-name‚ company-name‚ salary) company(company-name‚ city) manages(employee-name‚ manager-name) For each of the following queries‚ give an expression in relational algebra‚ tuple relational calculus‚ and domain relational calculus: a. Find the names of all employees who work for First Bank Corporation. b. Find the names and cities of residence of all employees
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Explain the key components required for client workstations to connect to a network and access network resources. Scenario I work for the IT support department of SMARTNETS Inc. an organisation that specialises in Network solutions for medium to large companies. The managers have now asked me to plan the network options for a charity called UCANHELP with an office in Northolt and will like to share resources between 6 computers‚ not in the same room but require internet connection‚ video conference
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Peer-to-Peer Networks for Content Sharing Choon Hoong Ding‚ Sarana Nutanong‚ and Rajkumar Buyya Grid Computing and Distributed Systems Laboratory‚ Department of Computer Science and Software Engineering‚ The University of Melbourne‚ Australia (chd‚ sarana‚ raj)@cs.mu.oz.au ABSTRACT Peer-to-peer (P2P) systems are popularly used as “file-swapping” networks to support distributed content sharing. A number of P2P networks for file sharing have been developed and deployed. Napster‚ Gnutella
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elements of a computer based information system is the database. A database is a collection of records or information that is stored in a computer in a structured manner so that information can be stored‚ managed‚ and retrieved. Databases are very useful for manipulating large amounts of data and producing reports and documents. This paper takes a look at the Oracle database system and its usage within my organization. The main objective of a database is to help an organization accomplish its goals
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QUESTION1 Power Problems Alternating current (AC)‚ which is “food” to PCs and other network devices‚ is normally 110 volts and changes polarity 60 times a second (or 60 Hertz). These values are referred to as line voltage. Any deviation from these values can create problems for a PC or other network device. Power problems fall into three categories: * Overage * Underage * Quality Power Overage Problems During a power overage‚ too much power is coming into the computer. Power overage
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Normalization A logical design method which minimizes data redundancy and reduces design flaws. Consists of applying various “normal” forms to the database design. The normal forms break down large tables into smaller subsets. First Normal Form (1NF) Each attribute must be atomic • No repeating columns within a row. • No multi-valued columns. 1NF simplifies attributes • Queries become easier.
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History of Database Technology Past and Present The term database was popularized with the growth of the computer industry and is typically thought of as software used to store‚ index‚ manipulate‚ and retrieve information (Vaughn). Database software has been in use since the Census Bureau used a punch card system to meet the requirements for the collection‚ sorting‚ and reporting of data for the 1890 census (National Research Council). These earliest databases were flat file databases. The flat-file
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Brief History Of Databases In the 1960’s‚ the use of main frame computers became widespread in many companies. To access vast amounts of stored information‚ these companies started to use computer programs like COBOL and FORTRAN. Data accessibility and data sharing soon became an important feature because of the large amount of information required by different departments within certain companies. With this system‚ each application owns its own data files. The problems thus associated with
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