15.10 - PRIMARY KEY (column_name) - Teradata Database

Teradata Database SQL Data Definition Language Syntax and Examples

prodname
Teradata Database
vrm_release
15.10
created_date
December 2015
category
Programming Reference
featnum
B035-1144-151K

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 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.