Basic Concepts of Entity-Relationship Model
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YouTubeNeso Academy
Basic Concepts of Entity-Relationship Model
DBMS: Entity-Relationship (ER) Model Topics discussed: 1. Terminologies in relation to the ER Model: a. Entity. b. Attributes: • Composite vs Simple Attributes • Single-valued vs Multivalued Attributes • Derived vs Stored Attributes c. Complex Attributes. d. Null values. e. Entity Type, Entity Set. f. Key Attribute & Value Set of ...
1.1M viewsMay 27, 2021
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Activity - 1:Why is the ER model considered a top-down approach? Describe the four basic componentsof the ER model.Activity - 2:The ER model uses a number of notations and tags to represent different concepts. Outlinehow the basic ER components are represented in an ER diagram.Activity - 3:Describe what attributes represent in an ER model and provide examples of simple,composite, single-value, multi-value, and derived attributes.
Activity - 1:Why is the ER model considered a top-down approach? Describe the four basic componentsof the ER model.Activity - 2:The ER model uses a number of notations and tags to represent different concepts. Outlinehow the basic ER components are represented in an ER diagram.Activity - 3:Describe what attributes represent in an ER model and provide examples of simple,composite, single-value, multi-value, and derived attributes.
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