Question

What is the difference between valid time and transaction time in the context of temporal databases?

a.

Valid time captures when data is stored in the database, while transaction time captures the time period during which a fact is considered true.

b.

Valid time captures the time period during which a fact is considered true, while transaction time captures when data is stored in the database.

c.

Valid time and transaction time are synonymous and can be used interchangeably.

d.

Valid time refers to past events, while transaction time refers to future events.

Posted under Big Data Computing

Answer: (b).Valid time captures the time period during which a fact is considered true, while transaction time captures when data is stored in the database. Explanation:In the context of temporal databases, valid time captures the time period during which a fact is considered true, while transaction time captures when data is stored in the database.

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