16.20 - 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
16.20
Release Date
March 2019
Content Type
Programming Reference
Publication ID
B035-1145-162K
Language
English (United States)

VAR_SAMP operates differently depending on whether or not there is a GROUP BY clause in the SELECT statement.

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