Example: Default Primary Index When Neither Primary Index Nor Primary Key Is Specified - Advanced SQL Engine - Teradata Database

SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
Published
January 2021
Language
English (United States)
Last Update
2021-01-22
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B035-1144
lifecycle
previous
Product Category
Teradata Vantage™

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, Vantage 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);