1·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。
2·Because new rows are inserted in the part of the table that contains rows with similar values, data remains clustered without the need to run the REORG utility.
由于新行是插在表中具有近似值的行附近的位置，因此数据仍然是聚合的，而不需要运行REORG实用程序。
3·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）。