17.05 - Valid UNION Operations - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Manipulation Language

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
Release Date
January 2021
Content Type
Programming Reference
Publication ID
B035-1146-175K
Language
English (United States)

Besides simple queries, UNION can be used within the following operations:

  • Derived tables
    You cannot use the HASH BY or LOCAL ORDER BY clauses in derived tables with set operators.
  • Subqueries
  • INSERT … SELECT statements
  • Non-recursive CREATE VIEW statements

UNION ALL is the only valid set operator in a WITH RECURSIVE clause or CREATE RECURSIVE VIEW statement that defines a recursive query.