16.20 - Usage Notes - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Operators and User-Defined Functions

Product
Advanced SQL Engine
Teradata Database
Release Number
16.20
Release Date
April 2020
Content Type
Administration
Programming Reference
Publication ID
B035-1210-162K
Language
English (United States)

You can apply a window specification to an aggregate UDF. The window feature provides a way to dynamically define a subset of data, or window, and allows the aggregate function to operate on that window of rows. Without a window specification, aggregate functions return one value for all qualified rows examined, but window aggregate functions return a new value for each of the qualifying rows participating in the query.