Question

The results of each intermediate operation are created and then are used for evaluation of the next-
level operations. This is called​

Answer 1

Explanation:

The result of each intermediate operation are created and then are used foe valuation of the next level operations, this evaluation is called as Materialized evaluation. Each time an operation receives a request for tuples, it computes the next tuple or tuples to be returned and then returns that tuple.

Answer 2

Answer:

Explanation: The result of each intermediate operation are created and then are used foe valuation of the next level operations, this evaluation is called as Materialized evaluation. ... Each time an operation receives a request for tuples, it computes the next tuple or tuples to be returned and then returns that tuple.