To find last year's data / a particular year's data

Question

Hi ,
How to find out the data for the entire last year , i tried like
entered_date between to_char( '12/31/2008 11:59:59', 'MM/DD/YYYY HH12:MI:SS')
and to_char('01/01/2010 00:00:00', 'MM/DD/YYYY HH12:MI:SS' ) , but it is an invalid number error.
thanks.

Answer 1

Hi,
If you want something that doesn't require hard-coding a year, but automatically figures out what year it is:
WHERE   entered_date     >= ADD_MONTHS ( TRUNC (SYSDATE, 'YEAR')
                                          , -24
AND     entered_date     <  ADD_MONTHS ( TRUNC (SYSDATE, 'YEAR')
                                          , -12
                                )There are a couple of things to notice about the expression you posted (besides using TO_CHAR instead of TO_DATE):
WHERE  entered_date     BETWEEN TO_DATE ('12/31/2008 11:59:59', 'MM/DD/YYYY HH12:MI:SS')
                      AND       TO_DATE ('01/01/2010 00:00:00', 'MM/DD/YYYY HH12:MI:SS')BETWEEN includes both endpoints, so the expression above covers a tiny bit more than one year. It includes one second from 2008 and one second from 2010, as well as all of 2009.
Currently 2010 is the last year, so the expression you posted (as well as my suggestion) is actually for the year before last year, but it can easily be changed for any year.