How GROUP BY Affects Report Breaks

Teradata Vantage™ SQL Functions, Expressions, and Predicates

brand
Software
Teradata Vantage
prodname
Teradata Database
Teradata Vantage NewSQL Engine
vrm_release
16.20
category
Programming Reference
featnum
B035-1145-162K

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.