ER-Diagram is represents graphical representation of entities and relationship between them. ER-Diagram is really important for understanding flow of data within system.
Entity: An Entity is a business object which is represents a group of data.
ATTRIBUTE : An Attribute is a Sub-group of information/data within Entity.
Type of Entity Relationship:
- Many-to-Many Relationship
- One-to-Many Relationship
- One-to-One Relationship
SYMBOLS
EXAMPLE : ER-DIAGRAM
Join the conversation! Your thoughts help the community grow.