Nesting Aggregates - Analytics Database - Teradata Vantage

SQL Functions, Expressions, and Predicates

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Analytics Database
Teradata Vantage
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2024-01-12
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lifecycle
latest
Product Category
Teradata Vantageā„¢

Aggregate operations cannot be nested. The following aggregate is not valid and returns an error:

AVG(MAXIMUM (Salary)) 

Although direct nesting of aggregates is not supported, nested aggregates can be evaluated using a derived table that contains the aggregates to be nested. For more information, see Teradata Vantageā„¢ - Time Series Tables and Operations, B035-1208.

Also, aggregates can be nested in aggregate window functions. The following statement is valid and includes an aggregate SUM function nested in a RANK window function:

SELECT region
   ,product
   ,SUM(amount) 
   ,RANK() OVER (PARTITION BY region ORDER by SUM (amount))
FROM table;