More Related Content Similar to 2. Entity Relationship Model in DBMS Similar to 2. Entity Relationship Model in DBMS (20) More from koolkampus (20) 2. Entity Relationship Model in DBMS3. Entity Sets customer and loan customer-id customer- customer- customer- loan- amount name street city number 11. Mapping Cardinalities One to one One to many Note: Some elements in A and B may not be mapped to any elements in the other set 12. Mapping Cardinalities Many to one Many to many Note: Some elements in A and B may not be mapped to any elements in the other set 32. How about doing an ER design interactively on the board? Suggest an application to be modeled. 55. UML Class Diagram Notation (Cont.) * Note reversal of position in cardinality constraint depiction * Generalization can use merged or separate arrows independent of disjoint/overlapping overlapping disjoint