How to split dates on month wise...

Question

i need output like this.
if i select fromdate as 15-SEP-10 and Todate as 25-NOV-10 in where condition then
output should be like this.
FROMDATE TODATE
*15-SEP-10* 30-SEP-10
01-OCT-10 31-OCT-10
01-NOV-10 *25-NOV-10*
How do i do it.

Answer 1

Hi,
Similar to Dombrooks' solution:
DEFINE     start_date     = "DATE '2010-09-15'"
DEFINE     end_date     = "DATE '2010-11-25'"
SELECT     GREATEST (&start_date, ADD_MONTHS ( TRUNC (&start_date, 'MONTH')
                                   , LEVEL - 1
           )          AS fromdate
,     LEAST    (&end_date,   ADD_MONTHS ( TRUNC (&start_date, 'MONTH')
                                   , LEVEL
                           ) - 1
           )          AS todate
FROM    dual
CONNECT BY     LEVEL <= 1 + MONTHS_BETWEEN ( TRUNC (&end_date,   'MONTH')
                                        , TRUNC (&start_date, 'MONTH')
;Simpler, but, depending on your requirements, less efficient:
SELECT         MIN (&start_date + LEVEL - 1)     AS fromdate
,         MAX (&start_date + LEVEL - 1)     AS todate
FROM         dual
CONNECT     BY  LEVEL <= 1 + &end_date
                     - &start_date
GROUP BY    TRUNC ( &start_date + LEVEL - 1
                      , 'MONTH'
ORDER BY    fromdate
;