I want to derive total days

e.g. user define in the parameter as below

option1-

01-01-2011 to 31-08-2011 ( no of days require to be diplayed/printed) as output

option2-
e.g. whinr100.trdt and system date ( no of days to be displayed/printed) as output

where and how to define ..pl. provide with example

Working days or calender days?

calendar days....

Extract the year,month,date from the utc date with utc.to.date(). Convert it to a date with date.to.num(). Do this for both utc dates. The difference between both results is the number of days.