What expression or logic to use for creating a BO report where : 1> I will be prompted for say, a date, when I refresh it 2> and this same report when I submit to DAS, a subquery will compute the date without being prompted.
What do you mean by Sub-query? Can it be represented by BO?
I think what you need is, create a query with a prompt which will throw prompt screen while refreshing the report from BusinessObjects and create a script and attach it with the DAS job which will set the date value for the prompt variable.