How to get number days b/w 2 dates excluding Sat & Sun in Cognos8.4.

[ChTripathi]

Hi,

I have a requirement that I need to calculate the number of days b/w 2 dates excluding weekends (ie. Saturday, Sunday).

Say there is table and the output that I require.

Name | Start_Date   | End_Date    | Duration (END_DATE - START_DATE)
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ABC  | 07-JUL-2011  | 12-JUL-2011 |  3

Normal subtraction, I will get 5 days, but i need to get the working days (excluding sat, sun). Is there any function in Cognos8.4 which I can use and get the result?