Er modeling er diagram. Dependent and weak entities pg 3 composite key the attributes employeenum. Fammbrid combine to form the primary key of. Yes i would expect that to be a non. Identifying relationship. Is identifying and the child entity is.
Dependent weak entities. A weak entity whose identifier is independent of the identifier of strong entity on which the weak identity depends, but is still a weak entity. Dependent example above, dependent is a non. Dependent weak entity, because a dependent is identified with his. Her own name that is not dependent on the name. Or other identifier. Identifying the employee. Dependent entities are weak entities. Database processing. Fundamentals, design, and implementation.
Sometimes, the word entity is used in a general sense of a being, whether or not the referent has material existence. Is oftenreferred to as an entity with no corporeal form, such as alanguage. Some entities are weak, but not id. Database processing. Fundamentals, design, and implementation.
Dependent weak entities. The identifier of the parent does not appear in the identifier of the weak child entity. In entity relationship modeling, solid lines represent strong relationships and dashed lines represent weak relationships.