ERD Diagrams for Core Data in Your iOS App
Create Database Links
A class diagram is a way of representing the structure of a system by showing classes, attributes, operations and relationships among objects.
An Entity Relationship Diagram (ERD) shows the relationships of entity sets stored in a database.
Before we start
Difficulty: Beginner | Easy | Normal | Challenging
Terminology:
ERD: An Entity Relationship Diagram (ERD) shows the relationships of entity sets stored in a database
Prerequisites:
- You will be expected to be aware how to make a Single View Application
Entities and Entity-Relationship Diagrams
An entity represents an activity, concept, event, object, person, place or thing of interest to an organization and about which the data represents.
The diagram represents a relationship between *two* of the entities
Note that Entity names are singular, and the relationship is represented by the association between the two entities. In the case of the ward and patient, note that there is a *one-to-many* relationship between the two.
