I encounter a problem when i create a statement report.

I need to show start date and end date of a record.

For start date column, there is no problem, but for end date column, there is some null inside.

 

For example, Call Date: 10-Oct-2009

                     Previous Call Date:

 

In the previous call date should be 3-Oct-2009 in weekly mode or 9-Oct-2009 in daily mode due to {?period}. Please consider there is possibilities of month and year changing.

 

What should i set to my {@Previous Call Date} in oder to get the answer i want?

 

 

Thank you.