15.10 - 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 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” description.

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.