How is the data structure of System R different from the relational structure? - Unlike Relational systems in System R � Domains are not supported � Enforcement of candidate key uniqueness is optional � Enforcement of entity integrity is optional � Referential integrity is not enforced

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Question: How is the data structure of System R different from the relational structure?

Answer: Unlike Relational systems in System R
� Domains are not supported
� Enforcement of candidate key uniqueness is optional
� Enforcement of entity integrity is optional
� Referential integrity is not enforced

Category	Database Interview Questions & Answers - Exam Mode / Learning Mode
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Question: How is the data structure of System R different from the relational structure?

Answer:

Unlike Relational systems in System R
� Domains are not supported
� Enforcement of candidate key uniqueness is optional
� Enforcement of entity integrity is optional
� Referential integrity is not enforced Source: CoolInterview.com

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