Database Schema Design Using Entity-Relationship Approach
1Database Schema DesignUsingEntity-Relationship Approach (ER Approach or ER Model)Tok Wang LingNational University of Singapore2TopicsER Model2 Concepts/Constructs in ER Approach and diagramoCardinality vs. Participation ConstraintoWeak Entity Type, EX/ID Relationship Types, generalization and specializationoSome extensions: Aggregation, Multiple FDs Representation English Sentence Structure and ER Diagramoself study ER Construct Notation Comparison Database Schema Design Using ER Approach Translation of a (Normal Form) ER Diagram to a RDB A Normal Form for ER Diagram333 ER Approach was proposed by Prof.
Some books and papers use slightly different terms: o entity and entity instance o relationship and relationship instance ... By the original definitions, an identifier-dependency relationship type (denoted by . ID) is also an existence-dependency relationship type. However, we should not just indicate an . ID .
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