database modeling: entity,attribute,relationship,rules for ER diagram-in Amharic | በአማርኛ |
Автор: AY EDUCATION
Загружено: 2022-09-09
Просмотров: 49960
this vedio focuses on database modeling, focusing on entities, attributes, relationships, and rules for ER diagrams, could be structured as follows:
1 Briefly explain what database modeling is.
Introduce the concept of ER diagrams.
2. Entities
Define what an entity is.
Provide examples
Explain how entities are represented in ER diagrams .
3. Attributes
Define attributes and their significance.
Differentiate between simple, composite, and derived attributes.
Show how attributes are represented (ovals connected to entities).
4. Relationships
Explain what relationships are and why they matter.
Discuss types of relationships (one-to-one, one-to-many, many-to-many).
Represent relationships (diamonds connecting entities).
5. Rules for ER Diagrams
Discuss key rules:
Each entity must have a unique identifier (primary key).
Relationships must be clearly defined.
Avoid redundancy.
Mention cardinality and participation constraints.
Summarize the importance of ER diagrams in database design.
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