This function of the stats command allows you to return the middle-most value of field X.

The median(X) function sorts all values of field X and returns the value at the midpoint position, providing the statistical median. It is the dedicated Splunk stats function for finding the central tendency of a numeric field without being skewed by outliers.

'Eval by X' is not a valid Splunk stats function; eval is a separate command used to compute new field values using expressions, and 'by X' is a grouping clause rather than a median calculation.

'Fields(X)' is not a valid stats aggregation function; fields is a search pipeline command for controlling which fields are included in results, not a statistical measure.

'Values(X)' is a valid Splunk stats function but returns a multi-value list of all distinct values of field X, not the single middle-most value.