Answered: what is the relationship between a…

Database Systems: Design, Implementation, & Management

12th Edition

ISBN:9781305627482

Author:Carlos Coronel, Steven Morris

Publisher:Carlos Coronel, Steven Morris

Chapter2: Data Models

Section: Chapter Questions

Problem 3P

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What is a functional decomposition diagram? what is a good example of a high level task being broken down into tasks in at least two lower levels (three levels in all).
Data modeling is most often accomplished through the use of a(n) __________________. a. entity-relationship diagram b. data-flow diagram c. functional decomposition diagram d. activity diagram
Data modelling is most often accomplished through the use of a(an) ________________. a. entity-relationship diagram b. data-flow diagram c. functional decomposition diagram d. activity diagram
For a business of your choice, use a graphics program to develop a data-flow diagram of one of its main processes and an entity-relationship diagram showing the data within the scope of the system.
Suppose you are working within the framework of the conceptual model in Figure Q4.5. FIGURE Q4.5 THE CONCEPTUAL MODEL FOR QUESTION 5
Using a graphics program, develop an entity-relationship diagram for a database application for an Internet bookstore where students buy textbooks from a salesperson and receive invoices for their purchases. Use Figure 5.5 as a guide.
A new sales ordering system needs a relational database that contains a customer table, a product inventory table, and an order table. Use a word-processing, graphics, or spread-sheet program to draw an entity-relationship diagram showing the relationships among these entities. Next, design each of these tables showing the keys and attributes to be included in each table. Include five sample records for each table.
The overall emphasis of the __________ phase is on gathering data on the existing system, determining the requirements of the new system, considering alternatives within identified constraints, and investigating the feasibility of alternative solutions. a. investigation b. analysis c. design d. construction
The overall emphasis of the ___________ phase is on gathering data on the existing system, determining the requirements of the new system, considering alternatives within identified Constraints, and investigating the feasibility of alternative solutions. a. investigation. b. analysis. c. design. d. construction.
The ______________ model is a simple but highly useful way to organize data into collections of two-dimensional tables called relations.

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