SQL multiple date formats in same table

I think I learned something.

I wanted to define a file via DDL with one date field *ISO and 1 date field
*USA. I couldn't figure out how to do it, so I created a test file with DDS
defining the date fields like this:

A R TESTREC
A DATEISO L TEXT('ISO date')
A DATFMT(*ISO)
A COLHDG('ISO' 'Date')
A DATEUSA L TEXT('USA date')
A DATFMT(*USA)
A COLHDG('USA' 'Date')

then I retrieved the SQL source for this DDS defined file. Both fields came
out exactly the same way:

-- Generate SQL
-- Version: V5R4M0 060210
-- Generated on: 08/28/07 11:22:50
-- Relational Database:
-- Standards Option: DB2 UDB iSeries

CREATE TABLE DBMSTF/TESTFILE (
DATEISO DATE NOT NULL DEFAULT CURRENT_DATE ,
DATEUSA DATE NOT NULL DEFAULT CURRENT_DATE )

RCDFMT TESTREC ;

LABEL ON COLUMN DBMSTF/TESTFILE
( DATEISO IS 'ISO Date' ,
DATEUSA IS 'USA Date' ) ;

LABEL ON COLUMN DBMSTF/TESTFILE
( DATEISO TEXT IS 'ISO date' ,
DATEUSA TEXT IS 'USA date' ) ;

Since the date format is for presentation purposes only, does this mean that
I cannot use multiple date formats in an SQL table? That the date format is
set by the Set Option DatFmt = ??? Statement alone?

If so, I'll work around it, but it just surprised me. I guess it makes
sense, though, since the date is 'stored on disk' the same irrespective of
the date format.