17.05 - Example: Upsert Without Specifying Primary Index - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Manipulation Language

Advanced SQL Engine
Teradata Database
Release Number
Release Date
January 2021
Content Type
Programming Reference
Publication ID
English (United States)

This example shows an upsert UPDATE request that does not specify the primary index in its WHERE clause.

     UPDATE sales
     SET item_count = item_count + 1
     WHERE sale_date = '05/30/2000'
     ELSE INSERT INTO sales (10, '05/30/2000', 1);

When the primary index is not specified in the UPDATE portion of an upsert request, the operation could have to perform an all-row scan to find rows to update. This is not the purpose of upsert form of UPDATE. This case returns an error.