DECODE Function Examples | Teradata Vantage - Example: Decoding IDs - Advanced SQL Engine - Teradata Database

The following query:

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

returns:

• 'United States' if the country_id is 1
• 'England' if the country_id is 2
• 'France' if the country_id is 3
• 'United States' if the country_id is not equal to 1, 2, or 3