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The crows feet notation on an ERD is a type of cardinality constraint.
Database design benefits from using entity-relationship diagrams. They display the parties involved, their characteristics, and the connections among them. Before creating the database, you must specify these components in order to fully comprehend its structure.
Crow's foot notation is a common technique for creating entity-relationship diagrams. The unusual arrows employed in crow's foot notation, which was first utilized in the 1970s, are also known as inverted arrows, chicken feet, and just forks.
Two indicators are used to describe the cardinality and modality of relationships in crow's foot notation. The term "cardinality" describes how often an instance of one thing can be linked to instances of another. You can find out how often an instance of one entity can be linked to instances of another entity by looking at its modality.
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