Nested Aggregation | Teradata Vantage - 17.10 - Nested Aggregation - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - Time Series Tables and Operations

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1208-171K
Language
English (United States)

Direct nesting of aggregates is not supported in Vantage, such as SELECT AVG(AVG(column))...). However, nested aggregates can be evaluated using a derived table that contains the aggregates to be nested. This is supported by both the GROUP BY TIME clause and the GROUP BY clause. The following examples show this for the GROUP BY TIME clause.