Database Design Using Entity-Relationship Diagrams, Second by Sikha Bagui

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By Sikha Bagui

Information, Databases, and the software program Engineering ProcessDataBuilding a DatabaseWhat is the software program Engineering Process?Entity courting Diagrams and the software program Engineering lifestyles Cycle section 1: Get the necessities for the Database section 2: Specify the Database part three: layout the DatabaseData and knowledge ModelsFiles, files, and knowledge ItemsMoving from three × five playing cards to ComputersDatabase types The Hierarchical ModelThe Read more...

summary: information, Databases, and the software program Engineering ProcessDataBuilding a DatabaseWhat is the software program Engineering Process?Entity courting Diagrams and the software program Engineering lifestyles Cycle part 1: Get the necessities for the Database part 2: Specify the Database part three: layout the DatabaseData and knowledge ModelsFiles, files, and knowledge ItemsMoving from three × five playing cards to ComputersDatabase versions The Hierarchical ModelThe community ModelThe Relational ModelThe Relational version and sensible DependenciesFundamental Relational DatabaseRelational Database and SetsFunctional

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Extra resources for Database Design Using Entity-Relationship Diagrams, Second Edition

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When Fred says, “Sally, this specification is all wrong,” what happens next? If Fred says, “Sally, this specification is acceptable,” what happens next? If, during the design, Sally finds out that Fred forgot to tell her about something he wants, what is Sally to do? How does Sally get Fred’s specifications in the first place? ” What does this mean? BIBLIOGRAPHY Schach, S. R. 2011. Object-Oriented and Classical Software Engineering. New York: McGraw-Hill. 1 INTRODUCTION In this chapter, we introduce more concepts that are essential to our presentation of the design of a database.

In brief, we next review the early steps in the SE life cycle as it applies to database design. 1 Phase 1: Get the Requirements for the Database In phase 1, we listen and ask questions about what facts (data) the user wants to organize into a database retrieval system. This step often involves letting users describe how they intend to use the data. You, the analyst, will eventually provide a process for loading data into and retrieving data from a database. There is often a “learning curve” necessary for the analyst as the user explains the system he or she knows so well to a person who may be uninformed of their specific business.

Database design is usually accomplished with an ER diagram that functions as the blueprint for the to-be-designed database. Since most users are unfamiliar with the notion of an ER diagram, our methodology will supplement the ER diagram with grammatical descriptions of what the database is supposed to contain and how the parts of the database relate to one another. The technical description of a database can be dry and uninteresting to a user; however, when the analysts put what they think they heard into English statements, the users and the analysts have a better meeting of the minds.

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