性能的提高取决于连接键被下推时所在维度表的过滤选择度。

The performance improvement depends on the selectivity of the filter on the dimension table from which the join keys are pushed down.

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当将 查找（lookup）表与其他较大的分区的表相连接时，通过将查找表也进行分区，可以最大化并行度。

When lookup tables are used in joins with other large partitioned table spaces, you can maximize the parallelism in the join by partitioning the lookup tables as well.

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当一个未知的信号被连接到测量装置时，例如伏特计或安培表，测量准确度则几乎完全由测量装置决定。

When an unknown signal is connected to a measuring device, such as a voltmeter or ammeter, the measurement accuracy is almost entirely determined by the measuring device.

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