datetime - Populate the monthly date from quarterly date in Oracle -


i have values in fact table below:

as of date  f_type      value 31-mar-17   abc corp    1.0 30-jun-17   abc corp    1.1

as of dates quarter end dates, need write query result set below:(month end dates between dates after value changed)

as of date  f_type      value 31-mar-17   abc corp    1.0 30-apr-17   abc corp    1.0 31-may-17   abc corp    1.0 30-jun-17   abc corp    1.1

how can populate 30-apr-17 , 31-may-17 rows??

code tried far:

select  as_of_date, f_type, value,x.* fact f inner join (select m_date,trunc(m_date+1,'q')-1 qtr_date (select to_date('31-jan-2017','dd-mon-yyyy') m_date dual union select to_date('28-feb-2017','dd-mon-yyyy') dual union select to_date('31-mar-2017','dd-mon-yyyy') dual union select to_date('30-apr-2017','dd-mon-yyyy') dual union select to_date('31-may-2017','dd-mon-yyyy') dual union select to_date('30-jun-2017','dd-mon-yyyy') dual union select to_date('31-jul-2017','dd-mon-yyyy') dual union select to_date('31-aug-2017','dd-mon-yyyy') dual union select to_date('30-sep-2017','dd-mon-yyyy') dual union select to_date('31-oct-2017','dd-mon-yyyy') dual union select to_date('30-nov-2017','dd-mon-yyyy') dual union select to_date('31-dec-2017','dd-mon-yyyy') dual ) )x on f.as_of_date=x.qtr_date

this gives me below:

as of date  f_type      value   m_date   qtr_date 3/31/2017   abc corp    1.0   3/31/2017  3/31/2017 3/31/2017   abc corp    1.0   4/30/2017  3/31/2017 3/31/2017   abc corp    1.0   5/31/2017  3/31/2017 6/30/2017   abc corp    1.1   6/30/2017  6/30/2017 6/30/2017   abc corp    1.1   7/31/2017  6/30/2017 6/30/2017   abc corp    1.1   8/31/2017  6/30/2017

is there way tune query , output well.

i think below query may work out you, tried table , checked output.

 select * fact  union  select add_months(as_of_date,lvl.lvl2) dt,           fact.f_type,           fact.value  fact,        (select level lvl2          dual           connect level<=2) lvl          ,(select  max(as_of_date) dt2            fact) fc2        add_months(as_of_date,lvl.lvl2)<=fc2.dt2

i have taken below data set:

as of date  f_type      value 31-mar-17   abc corp    1.0 30-jun-17   abc corp    1.1 30-sep-17   abc corp    1.2

added sep row test authenticity of query.

and getting output as:

as of date  f_type      value 31-mar-17   abc corp    1.0 30-apr-17   abc corp    1.0 31-may-17   abc corp    1.0 30-jun-17   abc corp    1.1 31-jul-17   abc corp    1.1 30-aug-17   abc corp    1.1 30-sep-17   abc corp    1.2

i hope you're looking for.


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