Which function can be used to find the current date and time of the operating system on which the Oracle database is running?

The SYSDATE() function can be used to find the current date and time of the operating system on which the Oracle database is running. The example given below shows how to do the same:-

SELECT TO_CHAR (SYSDATE, 'YYYY-MM-DD HH24:MI:SS') "Current Date:" FROM DUAL;