Question

What are temporal aggregation operators used for in stream-based query languages?

a.

To store data efficiently in a database.

b.

To compute aggregate values over sliding time windows.

c.

To optimize query plans for continuous queries.

d.

To define the semantics of stream-based queries.

Posted under Big Data Computing

Answer: (b).To compute aggregate values over sliding time windows. Explanation:Temporal aggregation operators in stream-based query languages are used to compute aggregate values over sliding time windows, allowing for operations like computing sums, averages, etc., over temporal data.

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