16.20 - UNIQUE - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Data Definition Language Syntax and Examples

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Published
March 2019
Language
English (United States)
Last Update
2019-05-24
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Any two rows in the table cannot have the same value or combination of values in the indexed columns.

You cannot specify UNIQUE for a secondary index:

  • if you also specify ALL.
  • for a secondary index defined on a join index.
  • if you also specify an ORDER BY clause.
  • for a column that has a LOB UDT or XML data type.