Unit 3 Assignment 1: Homework Learning Objectives and Outcomes Use the database modeling template in MS Visio. Create entities and add attributes of a database. Define relationship between entities of a database. Create many-to-many relationships with a linking table. Assignment Requirements Answer the following True or False questions on the student answer sheet. Required Resources Textbook Submission Requirements Submit your written answers to your instructor at the beginning
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Department of Education Office of Federal Student Aid Data Migration Roadmap: A Best Practice Summary Version 1.0 Final Draft April 2007 Data Migration Roadmap Table of Contents Table of Contents Executive Summary ................................................................................................................ 1 1.0 Introduction ......................................................................................................................... 3 1.1 1.2 1.3 1.4 Background
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replacements is contained in a codebook. An alternative definition of a code is any form of encryption which has no builtin flexibility‚ i.e. there is only one key‚ namely the codebook. Databases contain organized data. A database can be as simple as a flat file (a single computer file with data usually in a tabular form) containing names and telephone numbers of one’s friends‚ or as elaborate as the worldwide reservation system of a major airline. There are many ways to approach the design of a database
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• Data are raw facts. Information is the result of processing data to reveal their meaning. Accurate‚ relavant and timely information is the key to good decision making and good decision making is the key to organizational survival in a global environment • Data are usually stored in a database. To implement a database and manage its contents you need a database management system (DBMS). DBMS serves as an intermediary between the user and the database. The database contains the data you
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entity because it already has primary key and doesn’t depend on any other entity‚ but the reference is weak entity because depends on client entity and doesn’t have primary key. (Section 12.4). 12.11 You are required to create a conceptual data model of the data requirements for a company that specializes in IT training. The Company has 30 instructors and can handle up to 100 trainees per training session. The Company offers five advanced technology courses‚ each of which is taught by a teaching
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manipulate data‚ and understand the transactions process of database systems 2. provided with knowledge on modern database systems‚ data warehouses and on-line analytical processing‚ and the role of database in e-commerce 3. Explain the basic principles IT strategic planning‚ and the main techniques commonly used in the preparation of IS/IT strategic plans and Projects; By the end of the course‚ students should be able to: 1. Explain the principles of database management systems 2. Explain data modeling
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top-down vs. bottom-up design centralized vs. decentralized design 2 The Information System Database Carefully designed and constructed repository of facts Part of an information system Information System Provides data collection‚ storage‚ and retrieval Facilitates data transformation Includes people‚ procedures‚ hardware‚ and software 3 The Information System (Con’t.) System Analysis Establishes need and extent of an information system Refer to Recommended Requirements Gathering
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Data Mining DeMarcus Montgomery Dr. Janet Durgin CIS 500 June 9‚ 2013 Determine the benefits of data mining to the businesses when employing 1. Predictive analytics to understand the behavior of customers Predictive analytics is business intelligence technology that produces a predictive score for each customer or other organizational element. Assigning these predictive scores is the job of a predictive model‚ which has‚ in turn been trained over your data‚ learning from the experience
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boost performance in a database. Finding an individual record or set of records most efficiently done by Index. Index key is the reference point where an index is an ordered arrangement of keys and pointers. Each key is appointed to the location of the data recognized by the key. For example: when we print out at the NEU library we have given our User ID so when we print out we can easily find the documents. If no index exists on a table‚ a table scan must be performed for each table referenced in a
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Relational Database Concepts CO PY RI TE RI AL very organization has data that needs to be collected‚ managed‚ and analyzed. A relational database fulfills these needs. Along with the powerful features of a relational database come requirements for developing and maintaining the database. Data analysts‚ database designers‚ and database administrators (DBAs) need to be able to translate the data in a database into useful information for both day-to-day operations and long-term planning
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