Example: Decoding IDs Using NULL - 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„¢

The following query

SELECT DECODE(country_id, 1, 'United States', 
                          2, 'England')
    FROM customers; 

returns:

  • 'United States' if the country_id is 1
  • 'England' if country_id is 2
  • NULL if country_id isn't in the range 1 to 2