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Comment: Published by Scroll Versions from space DEV and version r0811

D toc


Computes the standard deviation across column values of Integer or Decimal type using the sample statistical method.

The standard deviation of a set of values attempts to measure the spread in values around the mean and is used to measure confidence in statistical results. A standard deviation of zero means that all values are the same, and a small standard deviation means that the values are closely bunched together. A high value for standard deviation indicates that the numbers are spread out widely. Standard deviation is always a positive value.


NOTE: This function applies to a sample of the entire population. More information is below.

D s terms

  • This function is calculated across a sample of all values.

  • For more information on a population version of this function, see STDEV Function.

If a row contains a missing or null value, it is not factored into the calculation. If no numeric values are detected in the input column, the function returns 0.

The square of standard deviation is variance. See VAR Function.

For a version of this function computed over a rolling window of rows, see ROLLINGSTDEV Function.

D s lang vs sql

D s

D lang syntax
WrangleTextpivot value:stdev(myRating) group: postal_code limit:1


Output: Returns the standard deviation of the values from the myRating column using the sample method of calculation.

D s

D lang syntax
WrangleTextpivot value:stdev(function_col_ref) [group:group_col_ref] [limit:limit_count]

stdevsamp(col_ref) [group:group_col_ref] [limit:limit_count]

ArgumentRequired?Data TypeDescription
function_col_refYstringName of column to which to apply the function

For more information on the group and limit parameters, see Pivot Transform.

D s lang notes


Name of the column whose values you wish to use in the calculation. Column must be a numeric (Integer or Decimal) type.

  • Literal values are not supported as inputs.
  • Multiple columns and wildcards are not supported.

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Required?Data TypeExample Value
YesString (column reference)myValues

D s

Include Page
EXAMPLE - Statistical Functions Sample Method
EXAMPLE - Statistical Functions Sample Method

D s also