Which of the following statements is FALSE about weak entity set?

CONCEPT

A weak entity set cannot be uniquely identified by its own attributes alone and is existence-dependent on an owner (strong) entity set.

Its partial key distinguishes weak entities belonging to the same owner; the owner key together with the partial key identifies an occurrence.

APPLICATION

Apply these two rules to each statement: check whether it preserves existence dependence and whether it keeps each weak-entity occurrence associated with a particular owner occurrence.

CONTRAST

• Deletion may cascade from an owner to its existence-dependent weak entities when that lifecycle rule is enforced.

• Modeling the dependent object as weak avoids giving it a redundant independent copy of the owner identifier merely to make it strong.

• A partial key becomes identifying only in combination with the key of the strong entity set.

• The identifying relationship associates weak-entity occurrences with specific strong-entity occurrences, so the occurrences are grouped by that relationship.

CROSS-CHECK

Imagine Employee as the strong entity and Dependent as the weak entity. A dependent name may repeat for different employees, so EmployeeId plus DependentName identifies the dependent, and each dependent belongs under one employee.

Therefore, the statement that weak-entity tuples are not partitioned according to their relationship with strong-entity tuples is the false statement.