STDDEV_POP Function | Standard Deviation Function | Teradata Vantage - 17.10 - STDDEV_POP - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - SQL Functions, Expressions, and Predicates

Advanced SQL Engine
Teradata Database
Release Number
Release Date
July 2021
Content Type
Programming Reference
Publication ID
English (United States)

Returns the population standard deviation for the non-null data points in value_expression.

To invoke the time series version of this function, use the GROUP BY TIME clause. For more information, see Teradata Vantageā„¢ - Time Series Tables and Operations, B035-1208.

For the STDDEV_POP window function that performs a group, cumulative, or moving computation, see Window Aggregate Functions.

Standard Deviation

The standard deviation is the second moment of a population. For a population, it is a measure of dispersion from the mean of that population.

Do not use STDDEV_POP unless the data points you are processing are the complete population.


STANDARD DEVIATION OF A SAMPLE is valid only for numeric data.

Nulls are not included in the result computation.

When there are no non-null data points in the population, then STDDEV_POP returns NULL.

Division by zero results in NULL rather than an error.