Title: Implicit Date conversion problem

We have a query (please don't ask me why it is written this way)

--Doesn't work:
select ea1.ep_number, ea1.est_dt, veas.est_dt
  from (select a.ep_number, ea.est_dt
          from v_episode_avail_summary_break a, episode_airings ea
         where a.ep_number = ea.ep_number
           and ea.est_dt between '20-Dec-02' and '01-Jan-03'
         group by a.ep_number, ea.est_dt) veas,
       episode_airings ea1
where veas.ep_number = ea1.ep_number
  and ea1.est_dt between '20-Dec-02' and '01-Jan-03'

vs.

--Works:
select ea1.ep_number, ea1.est_dt, veas.est_dt
  from (select a.ep_number, ea.est_dt
          from v_episode_avail_summary_break a, episode_airings ea
         where a.ep_number = ea.ep_number
           and ea.est_dt between '20-Dec-02' and '01-Jan-03'
         group by a.ep_number, ea.est_dt) veas,
       episode_airings ea1
where veas.ep_number = ea1.ep_number
  and ea1.est_dt between trunc(to_date('20-Dec-02','DD-Mon-YY'))
                     and trunc(to_date('01-Jan-03','DD-Mon-YY'))

Also if we comment "and ea1.est_dt between '20-Dec-02' and '01-Jan-03'" the non-working query runs fine.
Does anyone know what could be wrong? The est_dt is a date column. This is 9201 ...

Raj
______________________________________________________
Rajendra Jamadagni              MIS, ESPN Inc.
Rajendra dot Jamadagni at ESPN dot com
Any opinion expressed here is personal and doesn't reflect that of ESPN Inc.
QOTD: Any clod can have facts, but having an opinion is an art!

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