16.20 - Default Format - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Functions, Expressions, and Predicates

Product
Advanced SQL Engine
Teradata Database
Release Number
16.20
Release Date
March 2019
Content Type
Programming Reference
Publication ID
B035-1145-162K
Language
English (United States)

The result of a CASE expression is displayed using the default format for the resulting data type. The result of a CASE expression does not apply the explicit format that may be defined for a column appearing in a THEN/ELSE expression.

Consider the following table definition:

   CREATE TABLE duration
      (i INTEGER
      ,start_date DATE FORMAT 'EEEEBMMMBDD,BYYYY'
      ,end_date DATE FORMAT 'DDBM3BY4' );

Assume the default format for the DATE data type is 'YY/MM/DD'.

The following query displays the result of the CASE expression using the 'YY/MM/DD' default DATE format, not the format defined for the start_date or end_date columns:

   SELECT i, CASE
              WHEN i=1 
              THEN start_date
              WHEN i=2 
              THEN end_date
             END
   FROM duration
   ORDER BY 1;