Generating dates between two dates

I need to generate all dates between two given dates. This works fine as long as there is just one date range. However, if I have multiple date ranges, this solution doesn’t work. I have searched here as well as on asktom, but couldn’t locate relevant pointers/solution.

I tried both the solutions using all_objects and CONNECT BY ROWNUM, but no luck. Here is the problem statement: sqlfiddle

Input

ID  START_DATE      END_DATE 
101 April, 01 2013  April, 10 2013 
102   May, 10 2013    May, 12 2013

Output

ID  Dates
101 April, 01 2013 
101 April, 02 2013  
101 April, 03 2013  
101 April, 04 2013  
101 April, 05 2013  
101 April, 06 2013  
101 April, 07 2013  
101 April, 08 2013  
101 April, 09 2013  
101 April, 10 2013  
102   May, 10 2013  
102   May, 11 2013  
102   May, 12 2013

Answer

select 
  A.ID, 
  A.START_DATE+delta dt
from 
  t_dates A, 
  (
     select level-1 as delta 
     from dual 
     connect by level-1 <= (
       select max(end_date - start_date) from t_dates
     )
  )
where A.START_DATE+delta <= A.end_date
order by 1, 2

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Answer