It is shown that probabilistic statistics, fuzzy statistics and set-valued statistics are special cases of attributestatistics.
本文提出了属性统计方法,并指出,概率统计、模糊统计、集值统计是它的特殊情况。
2
There is an attribute RUNSTATS TIMESTAMP on the table or index node of the access plan graph that indicates the last time when the statistics were collected.