How Is The Data Structure Of System R Different From The Relational S

1.	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 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

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

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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How Is The Data Structure Of System R Different From The Relational Structure?

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