The FROM_DAYS function returns a date value in DATE type if INTEGER type is inputted as an argument.
It is not recommended to use the FROM_DAYS function for dates prior to the year 1582 because the function does not take dates prior to the introduction of the Gregorian Calendar into account.
If a value in the range of 0 to 3,652,424 can be inputted as an argument. If a value in the range of 0 to 365 is inputted, 0 is returned. 3,652,424, which is the maximum value, means the last day of year 9999.
FROM_DAYS(N)
SELECT FROM_DAYS(719528);
from_days(719528)
====================
01/01/1970
SELECT FROM_DAYS('366');
from_days('366')
=================
01/03/0001
SELECT FROM_DAYS(3652424);
from_days(3652424)
=====================
12/31/9999
SELECT FROM_DAYS(3652425);
ERROR: Conversion error in date format.
SELECT FROM_DAYS(-1);
ERROR: Conversion error in date format.
SELECT FROM_DAYS(0);
from_days(0)
===============
00/00/0000