Buckets

Question

Hi -
I am trying to extend our fiscal calendar using some analytical sql as it does not fall into some of the standard built-in date functions.
below is the code for what i need, any other suggestions for producing this is appreciated (I seem to have it but am mostly curious as to other, better and easier methods)
Trying to:
a) create week_bucket - 7 day intervals is 1 week, partitioned by year
b) create a month_bucket - follows a 5-4-4 per quarter per year (in other words the first month of each quarter has 5 weeks and the other 2 months have 4 - a quarter = each 3 months interval/yr).
c) create the quarter_bucket - week 1-3 = q1, 4-6 = 2, etc (note: not shown)
with c as(
select to_date('31-DEC-2010') + rownum dy, extract (year from to_date('31-DEC-2010') + rownum) yr
from dual
connect by level <3000
order by dy
select dy, yr,
-- row_number() over (partition by yr order by dy) as cnt,
ceil(row_number() over (partition by yr order by dy)/7) as week_bucket,
case when (ceil(row_number() over (partition by yr order by dy)/7)) < 6 then 1
     when (ceil(row_number() over (partition by yr order by dy)/7)) between 6 and 9 then 2
     when (ceil(row_number() over (partition by yr order by dy)/7)) between 10 and 13 then 3
     when (ceil(row_number() over (partition by yr order by dy)/7)) between 14 and 18 then 4
     when (ceil(row_number() over (partition by yr order by dy)/7)) between 19 and 22 then 5
     when (ceil(row_number() over (partition by yr order by dy)/7)) between 23 and 26 then 6
     when (ceil(row_number() over (partition by yr order by dy)/7)) between 27 and 31 then 7
     when (ceil(row_number() over (partition by yr order by dy)/7)) between 32 and 35 then 8
     when (ceil(row_number() over (partition by yr order by dy)/7)) between 36 and 39 then 9
     when (ceil(row_number() over (partition by yr order by dy)/7)) between 40 and 44 then 10
     when (ceil(row_number() over (partition by yr order by dy)/7)) between 45 and 48 then 11
     when (ceil(row_number() over (partition by yr order by dy)/7)) >48 then 12
     end as month_bucket
from cthanks!

Answer 1

I may be way off on what you're trying to accomplish here, but have you looked into using the following?
ME_XE?select to_char(sysdate, 'Q'), to_char(sysdate, 'W'), to_char(sysdate, 'MM') from dual;
TO_ TO_ TO_CHA
4 3 12
1 row selected.
Elapsed: 00:00:00.01
Q for quarter
W for week
MM for Month
For requirement A, in order to partition by year you would need to append in the YYYY portion of the year in question...