select extract(year from TO_DATE('20110812','YYYYMMDD')) from dual;
select extract(year from TO_DATE('20110812','YYYYMMDD')) from dual;
select extract(year from TO_DATE('20110812','YYYYMMDD')) from dual;
select extract(year from TO_DATE('20110812','YYYYMMDD')) from dual;
select extract(year from TO_DATE('20110812','YYYYMMDD')) from dual;
select extract(year from TO_DATE('20110812','YYYYMMDD')) from dual;