Mental models are ways in which an individual processes information in there minds. Psychologist Kenneth Craig suggested that individuals build small complex models to anticipate events in reality. It is a representation of reality‚ intuitively perceived by an individual. AAA Transportations and its employees‚ Vernon and Bud‚ are having a conflict between each others individual mental models. Vernon‚ the driver supervisor‚ and Bud‚ a corporate worker‚ have been working for AAA Transportations for
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indirect costs and determine the actual cost of specific technology implementations‚ you would use a: Total cost of ownership model. 4. Microsoft Word is an example of: Word-processing software. 5. All of the following place strain on system capacity‚ except for: Streamlining transaction processes and associated data entry. 6. The join operation: combines relational tables to provide the user with more information than is otherwise available. 7. The specialized language programmers use to
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Comparison Summary By Martin Rennhackkamp DBMS Server Comparison Supplement‚ November 1996 An Analysis Of The Strengths And Weaknesses Of The Big Six Database Servers. In 1991 I performed a thorough evaluation and comparison of the four major DBMSs at the time: Informix‚ Ingres‚ Oracle‚ and Sybase. This comparison was done for a client building a huge distributed database application‚ currently in its second phase of d evelopment‚ with the first phase running successfully country-wide. At
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logically stored. There are a series of guidelines that ensure the database is normalized. They are refered to as normal forms and are numbered from one (the lowest form) through five‚ althought the fifth form is rarely seen. The normal forms of relational database theory provide criteria for determining a table’s degree of vulnerablility to logical inconsistencies and anomalities. The higher the normal form‚ the less vulnerable it is to inconsistencies First normal form (1NF) sets the very basic
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modeling was originated 30 years ago and up to date is being used in mostly every field of work. It has become a mainstream practice in managing human resources. Over the years‚ the methods used has evolved. The trends used in the approach of competency models in education‚ training‚ assessments and development of workers has changed mainly because of its response to the changes that also occurs in the organizations and different workplace. It may also change because of the needs of the people. During those
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Normalization of Database Tables Introduction to Normalization of Database Tables Normalization of Database Tables l Introduction to Normalization of Database Tables 4 4 4 ISM 602 Dr. Hamid Nemati 4 4 4 Functional Dependency l Introduction to Normalization of Database Tables l l A Functional Dependency Is A Relationship Between Or Among Attributes Such That The Values Of One Attribute Depend On‚ Or Are Determined By‚ The Values Of The Other Attribute(s)
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never used as a primary key. A primary key is used to uniquely identify records in a table. D 11. Which of the following is used to uniquely identify records in a table? (A) (B) (C) (D) a Rule of Referential Integrity a foreign key a primary key a relational database C 12. Which of the following is used to insure that each value for
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points) Consider the E-R diagram in Figure 1‚ which models an online bookstore. a. List the entity sets and their primary keys b. Suppose the bookstore adds music cassettes and compact disks to its collection. The same music item may be present in cassette or compact disk format‚ with differing prices. Extend the E-R diagram to model this addition‚ ignoring the effect on shopping baskets. c. Now extend the E-R diagram‚ using generalization‚ to model the case where a shopping basket may contain any
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RDBMS Concepts 1. What is database? A database is a logically coherent collection of data with some inherent meaning‚ representing some aspect of real world and which is designed‚ built and populated with data for a specific purpose. 2. What is DBMS? It is a collection of programs that enables user to create and maintain a database. In other words it is general-purpose software that provides the users with the processes of defining‚ constructing and manipulating the database for various applications
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Introduction to Oracle9i: SQL Instructor Guide • Volume 1 40049GC11 Production 1.1 October 2001 D33993 Authors Copyright © Oracle Corporation‚ 2000‚ 2001. All rights reserved. Nancy Greenberg Priya Nathan This documentation contains proprietary information of Oracle Corporation. It is provided under a license agreement containing restrictions on use and disclosure and is also protected by copyright law. Reverse engineering of the software is prohibited. If this documentation
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