ADD UNIQUE (column_name) - Analytics Database - Teradata Vantage

SQL Data Definition Language Syntax and Examples

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Analytics Database
Teradata Vantage
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2024-10-04
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lifecycle
latest
Product Category
Teradata Vantage™
A column set as the UNIQUE constraint column set for table_name. The columns must be defined as NOT NULL.
If you specify more than one column_name, the UNIQUE column set is based on the combined values of the specified column name.
For an unnamed UNIQUE table constraint, use this syntax:
ADD UNIQUE (column_name)

You cannot add a UNIQUE constraint on a column with the JSON data type.

CONSTRAINT name
For a named UNIQUE table constraint, use this syntax:
ADD CONSTRAINT constraint_name UNIQUE (column_name)
A UNIQUE table constraint can be defined on a maximum of 64 columns.