I have a database view that is currently getting data using EXTRACT(YEAR FROM SYSDATE) so it only gets me data from this year. I need to get data from the view using the previous year's data plus the first three months of the current year always. Can I use the EXTRACT function to do this?

SQL> select
  2    extract(year from sysdate) y1,
  3    extract(year from add_months(sysdate,-12)) y2,
  4    extract(year from add_months(sysdate,-3)) y3
  5  from dual;

        Y1         Y2         Y3
---------- ---------- ----------
      2017       2016       2016