Entities and Relationships in Database Design

Explore the fundamental concepts of entities and relationships in database design through this comprehensive 40-minute lecture. Delve into topics such as the degree of relationships, diagrammatic notations, binary relationships, cardinality ratios, participation constraints, and structural constraints. Learn to differentiate between various cardinality ratios, including one-to-one, many-to-one, one-to-many, and many-to-many relationships, with practical examples. Examine the importance of total and partial participation constraints, compare different notations, and understand the use of attributes in relationship types. Conclude by investigating recursive relationships and the significance of role names in database modeling.