datamodels

1. DATA MODELS

2. Relationships within a data model Entity Attributes Data Value Key Attributes Record

3. Entity Person,place,thing,event or concept about which the information is recorded Attributes Attributes characterise the entity or describe the entity meaningfully. Data Value Each attribute of an entity has a value and is called as data value

4. Key Attributes The key attributes are used to find the values of other attributes Record Record is the collection of the attributes of an entity

5. Relation types ONE- TO- ONE ONE – TO- MANY MANY - TO- MANY

6. Symbols used in E-R Diagram ONE RELATION ENTITY RELATION MANY RELATION

7. occupies ONE-TO-ONE patient bed assigned ONE TO ONE RELATION

8. HOSPITAL ROOM PATIENT ONE-T0-MANY ACCOMADATES ONE-TO-MANY RELATION

9. THANK YOU