NULLIF Expression Examples | Teradata Vantage - 17.10 - Examples - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - SQL Functions, Expressions, and Predicates

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1145-171K
Language
English (United States)

The following examples show queries on the following table:

   CREATE TABLE Membership
      (FullName CHARACTER(39)
      ,Age SMALLINT
      ,Code CHARACTER(4) );

Example: Querying with the ANSI-Compliant Form

Here is the ANSI-compliant form of the Teradata SQL NULLIFZERO(Age) function, and is more versatile.

   SELECT FullName, NULLIF (Age,0) FROM Membership;

Example: Blank Spaces

In the following query, blanks indicate no value.

   SELECT FullName, NULLIF (Code, '    ') FROM Membership;

Example: Querying for NULLIF in an Expression with an Arithmetic Operator

The following example uses NULLIF in an expression with an arithmetic operator.

   SELECT NULLIF(Age,0) * 100;