Modern Database Management
13th Edition
ISBN: 9780134773650
Author: Hoffer
Publisher: PEARSON
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Chapter 1, Problem 1.13RQ
Program Plan Intro
Discussing differences between operational and Informational Management Systems
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Review the order system context diagram and compare it to the order system diagram 0 DFD. Answer the following questions:
How many external entities are shown in each diagram?
In each diagram, how many data flows connect to the external entities?
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Could the datastore have been shown in the context diagram? Why or why not?
How are Entity-Relationship Diagrams (ERDs) used to represent data models, and what are their key components?
There are two distinct types of data management: transactional and
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Chapter 1 Solutions
Modern Database Management
Ch. 1 - Prob. 1.1RQCh. 1 - Prob. 1.2RQCh. 1 - Prob. 1.3RQCh. 1 - Prob. 1.4RQCh. 1 - Prob. 1.5RQCh. 1 - Prob. 1.6RQCh. 1 - Prob. 1.7RQCh. 1 - How are relationships between tables expressed in...Ch. 1 - What does the term data independence mean, and why...Ch. 1 - Prob. 1.10RQ
Ch. 1 - Prob. 1.11RQCh. 1 - Prob. 1.12RQCh. 1 - Prob. 1.13RQCh. 1 - Prob. 1.14RQCh. 1 - Prob. 1.15RQCh. 1 - Prob. 1.16RQCh. 1 - Prob. 1.17RQCh. 1 - Prob. 1.18RQCh. 1 - Prob. 1.19RQCh. 1 - Prob. 1.20RQCh. 1 - Prob. 1.21RQCh. 1 - Prob. 1.22RQCh. 1 - Prob. 1.23RQCh. 1 - Prob. 1.24RQCh. 1 - Prob. 1.25RQCh. 1 - Prob. 1.26RQCh. 1 - Prob. 1.27PAECh. 1 - Prob. 1.28PAECh. 1 - Prob. 1.29PAECh. 1 - Prob. 1.30PAECh. 1 - Prob. 1.31PAECh. 1 - Prob. 1.32PAECh. 1 - Great Lakes Insurance would like to implement a...Ch. 1 - Figure 1-22 shows an enterprise data model for a...Ch. 1 - Prob. 1.35PAECh. 1 - Prob. 1.36PAECh. 1 - Prob. 1.37PAECh. 1 - Prob. 1.38PAECh. 1 - Prob. 1.39PAECh. 1 - Prob. 1.40PAECh. 1 - Prob. 1.41PAECh. 1 - Prob. 1.42PAECh. 1 - Prob. 1.43PAECh. 1 - Prob. 1.44PAECh. 1 - Consider the project data model shown in Figure...Ch. 1 - Answer the following questions concerning Figures...Ch. 1 - Prob. 1.47PAECh. 1 - Helen Jarvis wants to determine the most important...Ch. 1 - In this chapter, we described four important data...
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- Transactional and analytical approaches may be distinguished from one another when discussing data management. What are the similarities and differences between these two categories?arrow_forwardWhat is the difference between a data entity (data model) and an external entity (process model)?arrow_forwardWhat is the difference between a conceptual and a physical data flow diagram?arrow_forward
- When describing a data system, how should one talk about its administrative structure, its technology, and its organizational structure?arrow_forwardIn each diagram, how many data flows connect to the external entities? How many sub-processes are identified in the diagram 0 DFD? Could the datastore have been shown in the context diagram? Why or why not?arrow_forwardDraw me a context-level Data Flow Diagram To draw a context-level Data Flow Diagram (DFD) for the Ice Cream Shop System by hand or using diagramming software, follow these steps: Central Process: In the center of your page, draw a large rounded rectangle. Label it "Ice Cream Shop System" to represent the entire system. External Entities: Draw three rectangles on your page for the external entities: Place one rectangle at the top and label it "Customer" to represent the source of orders and feedback. Place another rectangle at the bottom and label it "Supplier" to represent the entities that supply inventory to the shop. Place the third rectangle to the left side of the central process and label it "Inventory System" to represent the system that tracks inventory levels and provides stock reports. Data Flows: Draw an arrow from the "Customer" rectangle to the central process. Label this arrow "Orders and Feedback" to show the data flow from customers to the system. Draw an…arrow_forward
- What distinguishes transactional and analytical data management?arrow_forward1.The phases of the systems development life cycle are circular in nature. true or false 2. Old-style methods of collecting system requirements include: 3. The database manager is responsible for initiating, planning, executing and closing down the project. 4. While developing a data-flow diagram for a hospital, web site's patient enrollment section is represented as a source on a data-flow diagram. True or false 5. Finding the best solution to a business problem or opportunity describes the attention to detail characteristic that a systems analyst should exhibit during the requirements determination phase. True or false 6. If your analysis of several written procedures reveals duplication of effort in two jobs, you should: Group of answer choices 7. Which of the following are organizational components that a systems analyst needs to understand? 8. A critical path refers to: 9. Explain the differences between a Gantt chart and a PERT/CPM chart. 10. Design a questionnaire to learn…arrow_forwardThe overview of an information system can be graphically represented by which level of a data flow diagram? * Context Diagram Decomposition Diagram Lower Level Diagram Process Diagramarrow_forward
- Explain the various layers of the Data Flow Diagram (DFDs).arrow_forward7-48. Review the data-flow diagrams given to you by your instructor. Study the data flows and data stored in these diagrams and decide whether you agree with the team’s conclusion that the only six entity types needed are listed in the case and in PE Figure 7-1. If you disagree, define additional entity types, explain why they are necessary, and modify PE Figure 7-1 accordingly.arrow_forwardFigure 2-26 shows a grade report that is mailed to students at the end of each semester. Prepare an ERD reflecting the data contained in the grade report. Assume that each course is taught by one instructor. Also, draw this data model using the tool you have been told to use in the course. Explain what you chose for the identifier of each entity type on your ERD.arrow_forward
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