Skewness_samp Function

The skewness_samp function returns the sample moment coefficient of skewness of a set of values.


The syntax of the skewness_samp function is


x are the values for which the population moment coefficient of skewness shall be calculated.
Null values are ignored.
If the number of values is zero, the function returns null.
w are the weights. If no value is provided the weight is assumed to be 1.


SELECT country, skewness_samp(price)
  FROM sales
  GROUP BY country;