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Entity PrimaryKey Attribute relationship Cardinality: zero to many Cardinality: one and only one Cardinality: one to many Explanation Entity Relationship.

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Presentation on theme: "Entity PrimaryKey Attribute relationship Cardinality: zero to many Cardinality: one and only one Cardinality: one to many Explanation Entity Relationship."— Presentation transcript:

1 Entity PrimaryKey Attribute relationship Cardinality: zero to many Cardinality: one and only one Cardinality: one to many Explanation Entity Relationship Diagrams

2 Faculty Courses Sections Students CourseID SectionID Year Semester FacultyID StudentID Grade CreditHour teaches Is offered takes Days StartTime EndTime Entity Relationship Diagram of Faculty/Courses/Students

3 Entity Relationship Diagram As a Schema in a Relational Database Explanation PrimaryKey Foreign Key ForeignKey1 ForeignKey2 (combined as primary key)

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