影响任务复杂性的相关要素是不同分组关键字的数量，而不是在计数函数中所看到的，不同的所聚合列的数量。

The relevant factor that impacts the complexity of the job is the number of different grouping keys, not the number of different aggregated columns that you would see in counting functions.

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如果希望查明哪个组件的缺陷比较多，只需按照组件名称对所有缺陷进行分组并统计数量。

If you want to figure out which component has more defects, you can simply group all the defects by the component name and do a count.

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