Concept of Relationships in ER Diagram

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DBMS: Concept of Relationships in ER Diagram • Topics discussed: • 1. Definition of Relationship example. • 2. Degree of Relationship: • a. Unary relationship • b. Binary relationship • c. Ternary relationship • 3. Relationship Constraints • a. Cardinality Ratio (one to one, one to many, many to one many to many). • b. Participation Constraints (Total partial participation). • 4. ER Diagram for COMPANY database. • 5. Attributes of Relationship Types. • 6. Role Names Recursive Relationships. • 7. Alternative Notations for ER Diagrams. • 8. Enhanced ER (EER) Model: • a. Generalization • b. Specialization • Follow Neso Academy on Instagram: @nesoacademy(https://bit.ly/2XP63OE) • Contribute: http://www.nesoacademy.org/donate • Memberships: https://bit.ly/2U7YSPI • Books: http://www.nesoacademy.org/recommende... • Website ► http://www.nesoacademy.org/ • Forum ► http://forum.nesoacademy.org/ • Facebook ► https://goo.gl/Nt0PmB • Twitter ►   / nesoacademy   • Music: • Axol x Alex Skrindo - You [NCS Release] • #DBMSByNeso #DBMS #ERDiagram

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