ER Model (Entity-Relationship Model) is a graphical representation of entities and their relationships to each other, used in database design.
The ER model defines entities as objects or concepts that have distinct characteristics and relationships between these entities.
The ER model is used to visually represent the relationships and constraints between data and is used to translate the conceptual design into a relational database design.
The ER Model is a conceptual framework for representing and designing the structure of a database. It represents data as entities, attributes, and relationships. Entities represent real-world objects or concepts, attributes describe properties of entities, and relationships define how entities are connected. ER diagrams, which are composed of symbols like rectangles, ovals, and diamonds, are used to illustrate the model and help in designing relational databases.
ER diagrams use specific notations such as rectangles for entities, ovals for attributes, and diamonds for relationships. The model helps in defining the logical structure of a database, making it clear and consistent. It is often used in the early stages of database design to translate real-world scenarios into a schema for a relational database.