I have a field on a form called [currentperiod] and it holds a number from 1-12 dependant on the month of the year a report is running for. I need to be able to subtract 1 or 2 from this number to be able to produce comaprison monthly reports.
If I'm running a report for period 10, I need to be able to do periods 8 & 9 also not a problem as I can just subtract one. however when I reach period 1 next year I need to be able to have the reports generated for periods 11 & 12 of the prior year. I have tried dateadd("m",-1,[currentperiod]) but it does not work all the time.
Is there anything I can do?