Parent-child supports a children aggregation as a direct analog to the nested aggregation discussed in Nested Aggregations. A parent aggregation (the equivalent of reverse_nested) is not supported.부모-자식은, Nested Aggregations에서 언급했던, nested aggregation과 정확히 닮은, children aggregation를 지원한다. parent aggregation(reverse_nested 와 비슷한)는 지원되지 않는다.This example demonstrates how we could determine the favor..