There are two types of weak entities: Associative Entities and subtype entities.

The sub-types are considered derived tables, which correspond to weak entities.

However, the basin agencies took many years and they still remain relatively weak entities.

In general (though not necessarily) a weak entity does not have any items in its primary key other than its inherited primary key and a sequence number.

There are two types of weak entities: associative entities and subtype entities.

The OrderItem table stores weak entities precisely because an OrderItem has no meaning independent of the Order.

Every entity (unless it is a weak entity) must have a minimal set of uniquely identifying attributes, which is called the entity's primary key.

Counties tend to be weak entities in New England, he said, but in Southern states they often take on responsibilities of policing and taxation.

Five years after its creation, the regulatory agency remains a relatively weak and marginal entity whose autonomy is doubtful.

Without the strong entity, the weak entity wouldn't exist.