CHAPTER 2 Methodology The Research Design The descriptive method of research was used for this study. To define the descriptive type of research‚ Creswell (1994) stated that the descriptive method of research is to gather information about the present existing condition. The emphasis is on describing rather than on judging or interpreting. The aim of descriptive research is to verify formulated hypotheses that refer to the present situation in order to elucidate it. The descriptive
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unambiguous definition for each attribute. Then‚ redraw BEC‚ Figure 6-1 by placing the six (and additional) entities in this case on the diagram along with their associated attributes. The updated ERD appears in the BEC ERD at the end of this section. Microsoft Visio was used to prepare the ERD. The Comment entity has the attributes: * Comment ID – a number generated by the system to uniquely identify a comment. * Membership ID – the membership number of the customer who makes the
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MMIS 630 Database Systems – Final Exam 1. What are the issues in the normalization vs. performance trade-off? Discuss. Your essay should (1) define and describe the characteristics of normalization‚ (2) define and describe the characteristics of performance‚ and (3) define and describe what is meant by “performance trade-off”‚ (4) summarize your essay with recommendations and/or guidelines regarding use of normalization in database design. ANS: When we take a close look in designing
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1. DBMS a) Problem with the traditional file environment In most organizations systems tended to grow independenty without a company-wide plan. Accouning‚ finance‚ manufacturing‚ human resources‚ and sales and marketing all developed their own systems and data files. Each application of course‚ required its own files and its own computer program to operate. For example‚ the human resources functional area might have personnel master file‚ a payroll file‚ a medical insurance file‚ a pension
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approach to the storage and processing of data in which independent files are consolidated into a common poolor database of records available to different application programs and end users for processing and data retrieval. Database Management System (DBMS): A set of computer programs that controls the creation‚
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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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FILE DESIGN- The study of file structures involves the investigation of the data structures used to organize a large collection of data into one or more external files that are stored on secondary storage devices. FILE - is a collection of related data. Example: payroll file FILE ORGANIZATION -refers to the way in which records are stored in an external file - refers to the data structures used for organizing the data. FOUR COMMON FILE ORGANIZATIONS 1. SEQUENTIAL FILE ORGANIZATION
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Define scope and boundaries Phase 6 7 Initial Study Activities 8 Phase 2: Database Design Most Critical DBLC phase Makes sure final product meets requirements Focus on data requirements Subphases I. Create conceptual design II. DBMS software selection III. Create logical
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Case Study: Hospital Databases Management System In what ways would DBMS help the Hospital? Wellmeadows Hospital serves a verity of clients for medical procedures‚ and employs a full staff of professional and administrative personnel. Currently the hospital is managed through paper forms‚ many of which require elements of the same information‚ so this case study exploring the HDBMS ways‚ needs‚ queries and the relationships that exist between the data. A database management system
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Database Processing‚ 13e (Kroenke/Auer) Chapter 9: Managing Multiuser Databases 1) Database administration tasks have to be performed for single-user‚ personal databases. Answer: TRUE Diff: 3 Page Ref: 396 2) Database administration is more important but less difficult in multiuser database systems than in single-user database systems. Answer: FALSE Diff: 2 Page Ref: 396 3) In general‚ the overall responsibility of the DBA is to facilitate the development and use of the database system
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