Statement returing True/False in decode() function

Hi,

I want to write a query that returns Y or N depending on whether the current time is within a specified window i.e.

EVENT_TABLE

event_id    number PK
event_start date
event_end   date

I tried this:
  SELECT event_id,

         decode( sysdate between event_start and event_end, TRUE, 'Y', 'N')

    FROM event_table

Unfortunately, Oracle won't accept a boolean expression inside the decode function.

I've accomplished what I want via a correlated sub-query:

SELECT event_id,

   nvl((SELECT 'Y' from event_table e2

         WHERE sysdate between event_start and event_end 
           AND  e.event_id=e2.event_id),'N')

But I'm wondering if there's a more aesthetic way to do it. Is there a way to feed an expression that evaluates to true-or-false to the first argument of the decode function?

Thanks.

-- 
//-Walt
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