Therefore, XGrind cannot perform any join, aggregation, nested queries, or construct operations.

因此，XGrind不能执行任何连接、聚合、嵌套查询或构建操作。

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Input data sets go through some operation (filtering, aggregation, or a join) in the early stages of the WebSphere DataStage job that reduces their size.

在WebSphere DataStage作业的早期阶段中，输入数据要经过一些操作的处理(过滤、聚合或连接)，这些操作会缩小数据的规模。

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Provides a join point for multiple input messages that enables message aggregation.

提供多个输入消息的联接点，该联接点支持消息聚合。

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