COALESCE Expression | Teradata Vantage - COALESCE Expression - 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
dita:mapPath
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„¢

Returns NULL if all its arguments evaluate to null. Otherwise, it returns the value of the first non-null argument in the scalar_expression list.

COALESCE is a shorthand expression for the following full CASE expression:

   CASE 
    WHEN  scalar_expression_1  IS NOT NULL 
    THEN  scalar_expression_1  
    ...
    WHEN  scalar_expression_n  IS NOT NULL 
    THEN  scalar_expression_n  
    ELSE NULL 
   END

Default Title

The default title for a COALESCE expression appears as:

<CASE expression>