Entity-Relationship Diagrams

Entity-Relationship Diagrams (ERDs) are a visual representation of the relationships between entities in a database. ERDs are used to design and model databases, and they help to ensure that the database is organized and efficient. ERDs consist of entities, which are objects or concepts that have attributes, and relationships, which describe how the entities are related to each other. Entities are represented as rectangles, and relationships are represented as diamonds. Attributes are represented as ovals, and they are connected to the entities they belong to. ERDs can be used to identify the relationships between entities, to ensure that the database is normalized, and to identify potential problems with the database design.
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