ER notation

Question	Answer
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.

Resource summary

	Created by linneamd over 8 years ago