Matthew_ER7.docx - Matthew Becker ER-7 Checkpoint 7.1 3.a...

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Matthew Becker ER -7 Checkpoint 7.1 3.a Double line would be leading up to weak entity. 4. Weak entities may not have a key attribute of their own as they are dependent on a strong or regular entity for their existence. 5. when an attribute is the identifier for a dependent, would be partial key. Checkpoint 7.2 1. Yes a weak entity can be depended on another weak entity 2. No 3. Yes Checkpoint 7.3 1. Rule that a person owns a pet. The person is a strong entity and the pet is a weak entity, the relationship Owns is a double diamond and pet is marked double boxed to show it has weak relations to person. 2. Weak entity will use the mapped strong entity for one unique key to be chosen as
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