NEXT_DAY returns the date of the first instance of a particular day of the week that follows the specified date.
DATE
NEXT_DAY(date, char)
date is a datetime expression.
char is a text expression that identifies a day of the week (for example, Monday) in the language of your session.
NEXT_DAY('11-SEP-01', 'Monday') returns the value 17-SEP-01.