17.10 - Alternatives To Nulls for Representing Missing Information - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - Database Design

Advanced SQL Engine
Teradata Database
Release Number
Release Date
July 2021
Content Type
User Guide
Publication ID
English (United States)

Unlike every other feature of the database relational model, the treatment of missing information is not based on a formal foundation. As a result, even though the usual explanations of nulls often appear to make common sense, any detailed investigation reveals a number of potentially serious problems with SQL nulls.

The following sections describe some proposed alternative solutions to the missing value problem.