Example: Decoding IDs When ID is Not Equal to 1, 2 or NULL

Teradata Vantageā„¢ SQL Functions, Expressions, and Predicates

brand
Software
Teradata Vantage
prodname
Teradata Database
Teradata Vantage NewSQL Engine
vrm_release
16.20
category
Programming Reference
featnum
B035-1145-162K

The following query:

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

returns:

  • 'United States' if the country_id is 1
  • 'England' if the country_id is 2
  • NULL if the country_id is NULL
  • NULL if the country_id is not equal to 1, 2, or NULL