16.20 - column_name - 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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A column in the column set to be used as the primary key or as unique.

You cannot specify the QITS column to be either UNIQUE or a PRIMARY KEY. See QITS_column_name.

If more than one column_name is specified, the PRIMARY KEY or UNIQUE column set is based on the combined values of the column named.

A maximum of 64 columns can be specified for a primary key.

Columns listed in a UNIQUE or PRIMARY KEY table constraint must all be defined as NOT NULL.