Query about previous days..Help needed

Question

Hi,
I have a scneario in which I want to get the sunday's date for 5 weeks after today's date as
expiry date.
i.e., If this sunday is '14-Sep-08' expiry date will be '19-Oct-08'
(As it is 5 weeks ahead of the present sunday)
I am getting this as NEXT_DAY(SYSDATE,'SUNDAY')+35;
Now, I need to get the expiry date for the previous sunday.
How can I acheive this.
Thanks in advance.
Regards
Raghu

Answer 1

No, because it's easily doable with next day:
-- Next Sunday (excluding today if today is Sunday):
select trunc(next_day(sysdate, 'SUNDAY')) next_sunday from dual;
NEXT_SUNDAY
14/09/2008
-- Last Sunday (= today if today is Sunday):
select trunc(next_day(sysdate-7, 'SUNDAY')) last_sunday from dual;
LAST_SUNDAY
07/09/2008NB: If you're wanting next sunday to display today's date if today is Sunday, then subtract 1 from the date you're doing the next_day on, eg:
select next_day(to_date('14/09/2008', 'dd/mm/yyyy'), 'SUNDAY') next_sun_excl_today,
       next_day(to_date('14/09/2008', 'dd/mm/yyyy') -1, 'SUNDAY') next_sun_incl_today
from dual;
NEXT_SUN_EXCL_TODAY     NEXT_SUN_INCL_TODAY
21/09/2008     14/09/2008