How do I get the year from the date in Oracle? __oracle

In Oracle, it is not difficult to get the year in the date, such as taking the year out of the sysdate. The common approach is to select To_number (sysdate, ' yyyy ') from dual, and in fact, Oracle has a better way of using the Extract function, which is: select Extract From dual, this method saves type conversions and appears more concise. Sysdate Accordingly, to obtain a month or day, you can use the Select Extract (month from sysdate) from dual and select extract from Sysdate.
This method gets the result that is numeric, and you can set a method to test it.