Query for months & quarter in date functions

Question

Hi All
Could some on assist me how to get Last Year 1st,2nd,,, months and Current Year 1st,2nd,3rd,,, months and same way Quarterly please.
I have date column Trade_date (dd/Mon/yyyy), Trade_price in Trade table
DB:Oracle 11g
Any assist would be appreciated

Answer 1

All you have done is repeat your unclear question with more words.
Here is how to get all the months for prior year and this year
SQL> alter session set nls_date_format = 'Mon-YYYY';
Session altered.
SQL> select
  2      add_months(this_year, - 12) last_year,
  3      this_year
  4  from
  5      (
  6      select
  7          add_months(trunc(sysdate,'y'), level - 1)    this_year
  8      from
  9          dual
10      connect by
11          level <= 12
12      );
LAST_YEA THIS_YEA
Jan-2010 Jan-2011
Feb-2010 Feb-2011
Mar-2010 Mar-2011
Apr-2010 Apr-2011
May-2010 May-2011
Jun-2010 Jun-2011
Jul-2010 Jul-2011
Aug-2010 Aug-2011
Sep-2010 Sep-2011
Oct-2010 Oct-2011
Nov-2010 Nov-2011
Dec-2010 Dec-2011
12 rows selected.And quarters
SQL> select
  2      add_months(this_year, - 12) last_year,
  3      this_year
  4  from
  5      (
  6      select
  7          add_months(trunc(sysdate,'y'), (level - 1) * 3)    this_year
  8      from
  9          dual
10      connect by
11          level <= 4
12      );
LAST_YEA THIS_YEA
Jan-2010 Jan-2011
Apr-2010 Apr-2011
Jul-2010 Jul-2011
Oct-2010 Oct-2011
SQL> alter session set nls_date_format = 'dd/mm/yyyy';
Session altered.
SQL> select
  2      add_months(this_year, - 12) last_year,
  3      this_year
  4  from
  5      (
  6      select
  7          add_months(trunc(sysdate,'y'), (level - 1) * 3)    this_year
  8      from
  9          dual
10      connect by
11          level <= 4
12      );
LAST_YEAR  THIS_YEAR
01/01/2010 01/01/2011
01/04/2010 01/04/2011
01/07/2010 01/07/2011
01/10/2010 01/10/2011As you can see from the second example, the display format of dates is controlled by the session,
>
he date column is trade_date (dd/mm/yyyy)
>
So this is still incorrect - if it is a date the format is not dd/mm/yyyy and, it is still not clear how this relates to your other questions.