How can Oracle obtain the year of time?

In Oracle SQL, there are several ways to retrieve the year from a date or timestamp.

1. By using the YEAR function, you can extract the year from a date or timestamp data type. For example:

SELECT YEAR(SYSDATE) FROM DUAL;

1. To use the EXTRACT function: You can utilize the EXTRACT function to extract a specified portion of a date or timestamp data type, such as the year. For example:

SELECT EXTRACT(YEAR FROM SYSDATE) FROM DUAL;

1. By using the TO_CHAR function, you can format a date or timestamp data type into a specific string and extract the year from it. For example:

SELECT TO_CHAR(SYSDATE, 'YYYY') FROM DUAL;

Any of the above three methods can be used to obtain the year of the time. Simply choose the appropriate method based on your specific needs.