Splitting values into quarters by date ?

Question

Just looking for some advice on how to do this
I have 3 columns
date_entered | value | flag
I have made a view called quarters_vw
date_entered | value |flag | quarter_1_2012 | quarter_2_2012 | etc...this goes on until quarter_4_2013
lets say i have a value in the view like
1000
I want to split this between 4 quarters which is no problem, but it has to be split based on when entered.
So...if entered in quarter 1, it would be divided by 4 into quarter 1-4, but if it is entered in quarter 2, it would be divided by 4 into quarters q2_2012 to q1_2013, and so on.
If entered in q4 of 2012, would be split into q4_2012, q1_2013,q2_2013,q3_2013. also if entered in q4_2012 , that means q3_2012,q2_2012, and q1_2012 would need to be 0.
this all happens only if the flag ='YES'
if the flag ='NO' then the value just goes into the quarter of when it was entered. no splitting it up.
any ideas how to do this ?
---------ok, will post my sql and sample data

Answer 1

Remember, I'm the one with no Database at hand (please bear with me), so maybe something like
select date_entered,value,flag,quarter
  from (select date_enrered,
               case flag when 'YES'       /* you might want to use the fourths */   
                         then value / 4   /* finite number of decimals if value not divisible by 4, but round(value,2) might not sum to value_entered*/
                         else value
               end value,
               flag,
               case flag when 'YES'
                         then to_char(add_months(trunc(date_entered,'month'),3 * (level - 1)),'yyyy_q')
                         else case when trunc(date_entered,'month') = add_months(trunc(date_entered,'month'),3 * (level - 1))
                                   then to_char(trunc(date_entered,'month'),'yyyy_q')
                              end
               end quarter
          from your_table
        connect by level <= 4
where quarter is not nullRegards
Etbin
Edited by: Etbin on 3.5.2012 11:14
This (although inefficiently) seems to work
with
your_table as
(select trunc(sysdate) - 100 date_entered,5000 value,'YES' flag from dual union all
select trunc(sysdate),6000,'YES' from dual union all
select trunc(sysdate) + 100,7000,'YES' from dual union all
select trunc(sysdate) - 50,7000,'NO' from dual union all
select trunc(sysdate) + 10,6000,'NO' from dual union all
select trunc(sysdate) + 100,5000,'NO' from dual
select distinct date_entered,value,flag,quarter
  from (select date_entered,
               case flag when 'YES'       /* you might want to use the fourths */   
                         then value / 4   /* finite number of decimals if value not divisible by 4, but round(value,2) might not sum to value_entered*/
                         else value
               end value,
               flag,
               case flag when 'YES'
                         then to_char(add_months(trunc(date_entered,'month'),3 * (level - 1)),'yyyy_q')
                         else case when trunc(date_entered,'month') = add_months(trunc(date_entered,'month'),3 * (level - 1))
                                   then to_char(trunc(date_entered,'month'),'yyyy_q')
                              end
               end quarter
          from your_table
        connect by level <= 4
where quarter is not null
order by 1,4Edited by: Etbin on 3.5.2012 12:12
A quick and dirty recursive with solution with roundoffs compensation
with
your_table as
(select trunc(sysdate) - 100 date_entered,5555.55 value,'YES' flag from dual union all
select trunc(sysdate),6000,'YES' from dual union all
select trunc(sysdate) + 100,7000,'YES' from dual union all
select trunc(sysdate) - 50,7000,'NO' from dual union all
select trunc(sysdate) + 10,6000,'NO' from dual union all
select trunc(sysdate) + 110,5000,'NO' from dual
quarters(i,date_entered,value,flag,quarter) as
(select 1,date_entered,value,flag,null
   from your_table
union all
select i + 1,
        date_entered,
        case when flag = 'YES' and i = 1
             then round(value / 4,2)
             else value
        end,
        flag,
        case flag when 'YES'
                  then to_char(add_months(trunc(date_entered,'month'),3 * (i - 1)),'yyyy_q')
                  else case when trunc(date_entered,'month') = add_months(trunc(date_entered,'month'),3 * (i - 1))
                            then to_char(trunc(date_entered,'month'),'yyyy_q')
                       end
        end
  from quarters
where i <= 4
select q.date_entered,
       case when q.rn = 1
            then q.value + y.value - q.rt
            else q.value
       end value,
       q.flag,
       q.quarter
  from (select date_entered,value,flag,quarter,
               sum(value) over (partition by date_entered,flag order by quarter) rt,
               row_number() over (partition by date_entered,flag order by quarter desc) rn
          from quarters
         where quarter is not null
           and i > 1
       ) q,
       your_table y
where q.date_entered = y.date_entered
   and q.flag = y.flag
order by 1,4