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

SQL Functions, Expressions, and Predicates

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Published
July 2021
Language
English (United States)
Last Update
2021-07-28
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SQL_Functions__Expressions__and_Predicates.Upload_071421/djk1612415574830.ditamap
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SQL_Functions__Expressions__and_Predicates.Upload_071421/wrg1590696035526.ditaval
dita:id
B035-1145
lifecycle
previous
Product Category
Teradata Vantageā„¢

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;