Entity-Relationship Diagram, ER Diagrams, Components of ER Diagram and ER Diagram Symbols DBMS Tutorial by Dr . Mahesh Huddar
The following concepts are discussed:
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Components of ER diagram,
Representation as ER Diagram,
ER Diagram Symbols
An ER diagram is composed of several components and each component in ER diagram is represented using a specific symbol.
1. Entity Sets - Strong Entity Set and WeakEntity Set
2. Relationship Sets - Strong Relationship Set and Weak Relationship Set
3. Attributes
4. Participation Constraints - Partial Participation and Total Participation
5. Specialization and Generalization
6. Cardinality Constraints / Ratios
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