On Thu, Aug 29, 2002 at 08:25:11PM +0900,
 Jean-Christian Imbeault <jc(at)mega-bucks(dot)co(dot)jp> wrote 
 a message of 14 lines which said:
> What would be the best data type to use to represent values of the kind 
> year/month? I.e. 2002/10, 2003/01
I would use a regular time stamp with a convention to set the day and
the time to zero (may be with a trigger to ensure that the convention
is respected).