PRIMARY KEY (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 or column set as the PRIMARY KEY constraint for the table. Columns specified in a PRIMARY KEY constraint must all be defined as NOT NULL.

For nontemporal tables, the PRIMARY KEY constraint implicitly uses a USI.

For temporal tables, the PRIMARY KEY constraint implicitly uses a single-table join index or, in certain cases, a USI. For details, see Teradata Vantage™ - Temporal Table Support, B035-1182.

For an unnamed PRIMARY KEY table constraint, use this syntax:

     CONSTRAINT PRIMARY KEY (column_name)
CONSTRAINT constraint_name
For a named PRIMARY KEY table constraint, use this syntax:
     CONSTRAINT constraint_name PRIMARY KEY (column_name)
If you specify multiple columns, the primary key constraint is based on the combined values of the specified columns. The primary key for the table can consist of up to 64 columns.