>>-MONTHNAME--(--expression--)---------------------------------><
The schema is SYSFUN.
Returns a mixed case character string containing the name of month (e.g. January) for the month portion of the argument, based on the locale when the database was started.
The argument must be a date, timestamp, or a valid character string representation of a date or timestamp that is neither a CLOB nor a LONG VARCHAR.
The result of the function is VARCHAR(100). The result can be null; if the argument is null, the result is the null value.