15.10 - Example: Default Primary Index When Neither Primary Index Nor Primary Key Is Specified - 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

The request in this example specifies neither a primary index nor a primary key. Assuming that the DBS Control parameter PrimaryIndexDefault is set to D or P, Teradata Database maps the first unique column, column_2 , to a UPI, which cannot be null.

     CREATE TABLE good_7 (
       column_1 INTEGER, 
       column_2 INTEGER NOT NULL UNIQUE,
       column_3 INTEGER NOT NULL UNIQUE);

This request defaults to the following definition.

     CREATE TABLE good_7 (
       column_1 INTEGER, 
       column_2 INTEGER NOT NULL UNIQUE,
       column_3 INTEGER NOT NULL UNIQUE)
     UNIQUE PRIMARY INDEX (column_2);