16.20 - Usage Notes - 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)

A null in the result row of a grouped query containing CUBE, ROLLUP, or GROUPING SET can mean one of the following:

  • The actual data for the column is null.
  • The extended grouping specification aggregated over the column and excluded it from the particular grouping. A null in this case really represents all values for this column.

Use GROUPING to distinguish between rows with nulls in actual data from rows with nulls generated from grouping sets.