17.05 - Duplicate Rows - 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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Unless the ALL option is used, duplicate rows are eliminated from each result set and from the final result.

If the ALL option is used, duplicate rows are retained for the applicable result set.

You can specify the ALL option for each UNION operator in the query to retain every occurrence of duplicate rows in the final result.