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Learn the basics of ER diagrams, a graphical notation for conceptual design of databases. See examples of entity types, attributes, relationships, constraints, and specialization/generalization.
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Construct a clean and concise ER diagram for the NHL database using the Chen notation as in your textbook. List your assumptions and clearly indicate the cardinality mappings as well as any role indicators in your ER diagram. Here is one sample solution. Note that other diagrams are possible depending on assumptions. date score game host guest ...
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QUESTION 3: CREATING A RELATIONAL DATABASE SCHEMA (37 points). Production tracking is important in many manufacturing environments (e.g., the pharmaceuticals industry, children’s toys, etc.). The following ER diagram captures important information in the tracking of production. Specifically, the ER diagram captures relationships between ...
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Entity-Relationship (ER) model •Popular high-level conceptual data model ER diagrams •Diagrammatic notation associated with the ER model 2
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ER diagrams, also known as Entity-Relationship diagrams, are graphical representations of the relationships between entities in a database. They are used to visually illustrate the structure of a database and the relationships between its tables and entities.
Draw an entity-relationship (ER) diagram that represents this information. Make sure to capture the constraints on the relationships involved, and designate appropriate primary keys for the entities.
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This PDF file contains exercises and solutions for learning and applying E-R diagrams, a data modeling technique. It covers topics such as primary, candidate, and superkeys, weak and strong entity sets, binary and ternary relationships, and more.
