How do you obtain the number of days in a month using Oracle?

In Oracle, you can get the number of days in a month using the following methods:

Option 1: Utilize the EXTRACT function.

SELECT EXTRACT(DAY FROM LAST_DAY(SYSDATE)) AS days_in_month
FROM dual;

Option 2: Utilize the TO_CHAR and TRUNC functions.

SELECT TO_CHAR(TRUNC(LAST_DAY(SYSDATE)), 'DD') AS days_in_month
FROM dual;

Both methods use the LAST_DAY function to obtain the last day of the current month, and extract the day using either the EXTRACT function or the TO_CHAR function.