17.05 - GROUP BY and DISTINCT - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Manipulation Language

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
Published
January 2021
Language
English (United States)
Last Update
2021-01-22
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For cases when the GROUP BY is semantically equivalent to DISTINCT, the optimizer makes a cost-based decision to eliminate duplicates either by way of a combined sort and duplicate elimination or an aggregation step.