17.10 - How GROUP BY Affects Report Breaks - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Functions, Expressions, and Predicates

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Published
July 2021
Language
English (United States)
Last Update
2021-07-28
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STDDEV_POP operates differently depending on whether there is a GROUP BY clause in the SELECT statement.

IF the query … THEN STDDEV_POP is reported for …
specifies a GROUP BY clause each individual group.
does not specify a GROUP BY clause all the rows in the sample.