clustered column chart 簇状柱形图
Quantile statistics provide the information whether the values of a column are clustered or not.
分位数统计信息提供关于一个列中的值是否聚合的信息。
The column has many duplicates (frequency statistics), or the values of the column are not evenly distributed, which means they are clustered in certain areas (quantile statistics)
该列有很多重复的值（频率统计信息），或者该列的值分布不均匀，即它们在某些局部是聚合的（分位数统计信息）。
You may consider an alternative of using a simple single-column identity clustering key, and creating an indexed view clustered around the 3 columns.
你可能会考虑使用一个简单的另一个单列身份集群键，并创建一个索引视图聚集在3列。
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