ER notation

Frage	Antworten
Image: a91a3aa6-b486-489e-b4ba-b04a98577411 (image/png)	Cardinality ratio: 1:N for E1:E2 in R
Image: 1a4bb57e-d03b-45d1-b251-c25d6d0372f1 (image/png)	Total participation of E2 in R
Image: 2fe7e9bf-7dc7-487f-b885-a39b2cea7686 (image/png)	Derived Attribute
Image: 0397b608-6b37-4e13-8385-02abe143c4af (image/png)	Composite Attribute
Image: 5513373d-7d24-4dac-a6cf-b668de9b6c98 (image/png)	Multivalued Attribute
Image: f85131de-62e3-4393-8a99-44300b8fd46a (image/png)	Key attribute
Image: f83e41c4-4fec-41cf-b9c8-a3fe7d7842e6 (image/png)	Attribute
Image: 444d7578-8b09-44c4-a628-a1243ea92d48 (image/png)	Identifying relationship
Image: 5b61f436-2b39-494b-b1a6-0a3c7c2b6710 (image/png)	Relationship
Image: 3404616f-3021-4adb-ac9c-b11c210ea18c (image/png)	Weak entity
Image: f8e78430-e447-41a7-ad2e-2fe68126b905 (image/png)	Entity
What is the meaning of total participation?	Every entity in the set is involved in some association (or tuple) of the relationship.

Zusammenfassung der Ressource

	Erstellt von linneamd vor etwa 8 Jahre