EXTRACT (
{ YEAR | MONTH | DAY | HOUR | MINUTE | SECOND }
| { TIMEZONE_HOUR | TIMEZONE_MINUTE }
| { TIMEZONE_REGION | TIMEZONE_ABBR }
FROM { date_value | interval_value } )
 
VALUES that can be extracted:
 
YEAR
MONTH
DAY
HOUR
MINUTE
SECOND
TIMEZONE_HOUR
TIMEZONE_MINUTE
TIMEZONE_REGION
TIMEZONE_ABBR
 
-- You can only extract YEAR, MONTH, and DAY from a DATE.
-- You can only extract TIMEZONE_HOUR and TIMEZONE_MINUTE 
-- from a timestamp with a time zone datatype.
 
EXTRACT (<type> FROM <datetime | interval>)
SELECT EXTRACT(YEAR FROM DATE '2007-04-01') FROM dual;
 
xtract(YEAR FROM DATE '2003-08-22')      -- would return 2003
EXTRACT(MONTH FROM DATE '2003-08-22')   -- would return 8
EXTRACT(DAY FROM DATE '2003-08-22')      -- would return 22