Databases Reference
In-Depth Information
DATA MODELING
Starting Point
Go to
www.wiley.com/college/gillenson
to assess your knowledge of data
modeling.
Determine where you need to concentrate your effort.
What You'll Learn in This Chapter
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The database design process and the initial design decisions in database design
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The three general categories of databases and their impact on database design
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Database modeling goals
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The role of business rules
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The importance of entities, attributes, and relationships
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Basic database objects: tables, views, and indexes
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Basic relationship types: binary, unary, and ternary
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Creating and reading an E-R diagram
After Studying This Chapter, You'll Be Able To
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Identify the tasks included in each database design step
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Accurately represent the business structure of your organization by identi-
fying the business rules associated with it
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Determine the appropriate functional type of database you need in your
organization by analyzing the business and user applications it will support
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Identify entities, attributes, and relationships
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Create a model including one-to-one, one-to-many, and many-to-many
relationships
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Properly use cardinality and modality in describing relationships
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Recognize requirements for intersection data
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Develop an entity-relationship (E-R) model that uniquely identifies and
describes each instance of an entity within your organization and its attrib-
utes, as well as show the associations and relationships between entities
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Read an E-R relational data diagram
