Please advise me to generate this fiscal closing month dates as shown below

Question

2007      2008     2009     2010
October               10/27/2007 10/25/2008 10/31/2009
November               11/24/2007 11/29/2008 11/28/2009
December               12/29/2007 1/3/2009     1/2/2010
January               1/26/2008     1/31/2009     1/30/2010
February               2/23/2008     2/28/2009     2/27/2010
March               3/29/2008     4/4/2009     4/3/2010
April               4/26/2008     5/2/2009     5/1/2010
May               5/31/2008     5/30/2009     5/29/2010
June               6/28/2008     7/4/2009     7/3/2010
July               7/26/2008     8/1/2009     7/31/2010
August               8/30/2008     8/29/2009     8/28/2010
September          9/29/2007     9/27/2008     10/3/2009     10/2/2010
Fiscal calendar closing dates for FY2008-2010.
‘Fiscal’ month and ‘Fiscal’ year closing dates will always be on Saturday so
the fiscal month will include either 4 or 5 complete weeks and fiscal
year will be 52 or 53 complete weeks. ‘Fiscal’ months and ‘Fiscal’
years do not close in the middle of a week as ‘calendar’ months and ‘calendar’ years may do.
For example, Fiscal April 2008 started on 3/30/2008 (Sunday, the day after the close of Fiscal March 2008)
and ended on 4/26/2008 (Saturday). Fiscal Year 2008 started on 9/30/2007 (Sunday)
and ends on 9/27/2008 (Saturday).
thanks,

Answer 1

Hi,
try this (vers. 10g/above)
SQL> with t as (  -- "SAMPLE DATA"
  2  select to_date('10/21/2007','mm/dd/yyyy') dt from dual
  3  ) -- "END SAMPLE DATA"
  4  select
  5  decode(to_char(add_months(dt, ctr),'Mon'),'Dec',
  6          next_day(add_months(dt, ctr-1)+35 , 'Saturday')
  7         ,next_day(last_day(add_months(dt, ctr)) - 7, 'Saturday')
  8  ) col1
  9  ,decode(ctr,0
10        ,next_day(add_months(last_day(add_months(dt, ctr)), 12) - 7,   'Saturday')
11        ,next_day(add_months(last_day(add_months(dt, ctr-1))+35, 12) -7,   'Saturday')
12  ) col2
13  ,decode(ctr,0
14         ,next_day(add_months(last_day(add_months(dt, ctr)), 24) -7,   'Saturday')
15         ,next_day(add_months(last_day(add_months(dt, ctr-1))+35, 24) -7,   'Saturday')
16  ) col3
17    from t
18    model
19    dimension by (0 dim)
20    measures ( 0 ctr)
21    rules iterate(12)
22    (  ctr[iteration_number+1] = ctr[iteration_number]+1 )
SQL> /
COL1        COL2        COL3
10/27/2007  10/25/2008  10/31/2009
11/24/2007  11/29/2008  12/5/2009
12/29/2007  1/3/2009    1/2/2010
1/26/2008   1/31/2009   1/30/2010
2/23/2008   2/28/2009   3/6/2010
3/29/2008   4/4/2009    4/3/2010
4/26/2008   5/2/2009    5/1/2010
5/31/2008   5/30/2009   5/29/2010
6/28/2008   7/4/2009    7/3/2010
7/26/2008   8/1/2009    7/31/2010
8/30/2008   8/29/2009   9/4/2010
9/27/2008   10/3/2009   10/2/2010
10/25/2008  10/31/2009  10/30/2010
13 rows selected