In a diagram, how is a one-to-many relationship represented?

A one-to-many relationship in a diagram is represented by an end that features a crow's foot topped by a short mark. This notation indicates that one entity can be associated with multiple instances of another entity, while the multiple instances of the related entity can only relate back to that one entity.

The crow's foot symbol visually conveys the "many" aspect of the relationship, resembling a forked path that diverges, while the short mark signifies that there is exactly one instance of the first entity for each instance of the second entity in the relationship. This combination effectively communicates the cardinality of the relationship, which is crucial for understanding how different data entities relate to each other in database design and data modeling.