Calculates the percentile of the values in a specified column of the search query results.
Syntax: <character string>
Description: The value of a percentage
A percentile is a measure used in statistics indicating the value below which a given percentage of observations in a group of observations fall
* in log.system audit | order by process time (ms) | percentile 95
From the events in system audit log, returns the percentile 95% of the events observed by column process time (ms).