Getting the Last day for a given week number

Dear Gurus,
I want to find the Last day of a given week number.
Can anyone help me out.
Regards
Madhu K

Here I dont want to pass date,
If I give Week Number, Can I get that Week Numbers
Last date and First Date.
test@ORA10G>
test@ORA10G> -- this query fetches the start and end dates for a specified week in the current year
test@ORA10G>
test@ORA10G> select
  2    wk as week,
  3    min(dt) as start_date,
  4    max(dt) as end_date
  5  from (
  6    select
  7      trunc(sysdate,'yyyy')+level-1 as dt,
  8      to_char(trunc(sysdate,'yyyy')+level-1,'ww') as wk
  9    from dual
10    connect by level <= trunc(add_months(sysdate,12),'yyyy') - trunc(sysdate,'yyyy')
11  )
12  where wk = &week_number
13  group by wk;
Enter value for week_number: 1
WE START_DAT END_DATE
01 01-JAN-08 07-JAN-08
test@ORA10G>
test@ORA10G> /
Enter value for week_number: 23
WE START_DAT END_DATE
23 03-JUN-08 09-JUN-08
test@ORA10G>
test@ORA10G> /
Enter value for week_number: 52
WE START_DAT END_DATE
52 23-DEC-08 29-DEC-08
test@ORA10G>
test@ORA10G> /
Enter value for week_number: 53
WE START_DAT END_DATE
53 30-DEC-08 31-DEC-08
test@ORA10G>
test@ORA10G>pratz
can be shortened further:
test@ORA10G>
test@ORA10G> select
  2    to_char(trunc(sysdate,'yyyy')+level-1,'ww') as wk,
  3    min(trunc(sysdate,'yyyy')+level-1) as start_dt,
  4    max(trunc(sysdate,'yyyy')+level-1) as end_dt
  5  from dual
  6  where to_number(to_char(trunc(sysdate,'yyyy')+level-1,'ww')) = &week_number
  7  connect by level <= trunc(add_months(sysdate,12),'yyyy') - trunc(sysdate,'yyyy')
  8  group by to_char(trunc(sysdate,'yyyy')+level-1,'ww')
  9  /
Enter value for week_number: 1
WK START_DT  END_DT
01 01-JAN-08 07-JAN-08
test@ORA10G>
test@ORA10G> /
Enter value for week_number: 53
WK START_DT  END_DT
53 30-DEC-08 31-DEC-08
test@ORA10G>
test@ORA10G> /
Enter value for week_number: 23
WK START_DT  END_DT
23 03-JUN-08 09-JUN-08
test@ORA10G>
test@ORA10G> /
Enter value for week_number: 14
WK START_DT  END_DT
14 01-APR-08 07-APR-08
test@ORA10G>
test@ORA10G>Message was edited by:
pratz

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