How to achieve this result ?

Question

I've two date. I want to know the month and year name and the days between this two.
Like. First date is 10/01/2012
Second date is 20/04/2012
I want..
January 2012    21 Days
February 2012  29 Days
March 2012     31 Days
April 2012    20 DaysAny idea ?

Answer 1

Hi,
In addition to Frank's solution, you can also do it as follow so you don't have to group by :SQL> l
  1  select
  2  to_char(add_months(trunc(to_date('&&dstart.','dd/mm/yyyy'),'mm'),level-1),'fmMonth yyyy') mthy
  3  ,least(
  4       last_day(add_months(trunc(to_date('&&dstart.','dd/mm/yyyy'),'mm'),level-1))
  5       ,to_date('&&dend.','dd/mm/yyyy')
  6  )
  7  - greatest(
  8       add_months(trunc(to_date('&&dstart.','dd/mm/yyyy'),'mm'),level-1)-1
  9       ,to_date('&&dstart.','dd/mm/yyyy')
10  ) days
11  from dual
12* connect by level <= trunc(months_between(to_date('&&dend.','dd/mm/yyyy'), to_date('&&dstart.','dd/mm/yyyy')))+1
SQL> define dstart="10/01/2012"
SQL> define dend="20/04/2012"
SQL> /
MTHY                       DAYS
Janvier 2012                 21
Fevrier 2012                 29
Mars 2012                    31
Avril 2012                   20
4 ligne(s) selectionnee(s).
SQL> define dstart="10/01/2012"
SQL> define dend="20/01/2012"
SQL> /
MTHY                       DAYS
Janvier 2012                 10
1 ligne selectionnee.
SQL> define dstart="10/01/2012"
SQL> define dend="20/03/2013"
SQL> /
MTHY                       DAYS
Janvier 2012                 21
Fevrier 2012                 29
Mars 2012                    31
Avril 2012                   30
Mai 2012                     31
Juin 2012                    30
Juillet 2012                 31
Aout 2012                    31
Septembre 2012               30
Octobre 2012                 31
Novembre 2012                30
Decembre 2012                31
Janvier 2013                 31
Fevrier 2013                 28
Mars 2013                    20
15 ligne(s) selectionnee(s).There is 1 row generated for each month in the interval instead of 1 for each day.
That shouldn't be a big benefit, unless the interval spans several centuries !
:-)