What type of relationship is needed when a single record in the base type is related to multiple records in the related type?

The correct answer, which indicates a one-to-many relationship, highlights a specific scenario in which a single record in one base type can be associated with multiple records in another related type. In this context, the base type is often referred to as the 'parent' entity, while the related type is designated as the 'child' entity.

In a one-to-many relationship, each instance of the parent entity can connect to several instances of the child entity, but each instance of the child can link back to only one instance of the parent. This is a common data modeling approach that effectively represents situations where, for example, a single customer can have multiple orders, or a single department can have multiple employees associated with it.

This type of relationship is fundamental in designing databases or data structures, as it allows for efficient organization and retrieval of related data. The one-to-many relationship serves to maintain a clear hierarchy among entities, making it easy to navigate and manage data.

For a better understanding, in contrast, a one-to-one relationship would imply that each record in the base type could be linked to only one record in the related type, which does not fit the scenario described. Similarly, many-to-one would suggest multiple records in the first entity could link back