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How do I count months?

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  • How do I count months?

    I'm working on a database for a financial advisor and I'm trying to calculate the number of months before the client retires.

    It's based on their preferred retirement age, which is input by the user. I can work out the actual retirement date no problem, but I want to be able to display how many months there are from the current date until the client retires.

    Does anyone have any ideas on how to do this, please? In MSAccess, I could use the DateDiff function, but there's nothing like it in Alpha 5 V5.

    Thanks in advance.

  • #2
    RE: How do I count months?

    You could probably use
    Month(date2)-Month(date1)

    Russ

    Comment


    • #3
      RE: How do I count months?

      That will work for someone retiring this year. If they are retiring in a few yerars, then you would need a somewhat more complicaited calc.


      Months left in this year 13 - month(date())
      months per year * number of whole years 12 * years
      months in last year month(retire_date)

      Add them up and you should be good.

      Tom

      Comment


      • #4
        RE: How do I count months?

        Tom, I think it's more complex.

        Need to deal with 3 scenarios:

        a) if current month of year = month of final year

        b) if current month of year month of final year


        Even then this approach will be able to tell you at best how many times the calendar moved into a new month...

        This may or may not be sufficient for the intended purpose. If it were me I'd check the regs to see how they define a 'month' and then implement something that fits. Otherwise you may find that they might not count a month if less than half of it has passed, or something else...

        If you start on January 25th and end on February 3 of the same year is this one month, or two, or none?

        -- tom

        Comment


        • #5
          RE: How do I count months?

          Simon,

          Given what the others have said, try this:

          ret_date = {some date} date of retirement

          cutoff = 15

          adjust = iif(day(date())cutoff,2,1),0)

          num_months = 12-month(date()) + (year(ret_date)-year(date())-1) * 12 + month(ret_date)-1 + adjust

          Explanation:

          12-month(date()) -- gives you the number of months left this year (not including this month)

          (year(ret_date)-year(date())-1) * 12 -- gives you the number of months in all the whole years between this year and the year of retirement

          month(ret_date)-1 -- gives you the number of months before the month of retirement in the final year

          cutoff -- this is the day of the month (for this month and the month of retirement) after which the month is or is not counted

          adjust -- formula to determine the number of months to add based on the following:
          a--if today is the 15th or earlier, count the month
          b--if the day of retirement is after the 15th, count the month

          I hope this helps.

          Stephen Pilon
          Stephen Pilon
          Associate Librarian
          Christendom College

          Comment


          • #6
            RE: How do I count months?

            I think this simple calculation should work.

            12-month(date())+(month(ret_date)-12)+(year(ret_date)-year(date()))*12

            Daniel Weiss
            Daniel Weiss
            EZ Link Software

            Comment


            • #7
              RE: How do I count months?

              I forgot to take in account the cutoff date, this should do it

              12-month(date())+(month(ret_date)-12)+(year(ret_date)-year(date()))*12+iif(cutoff-day(date())
              Daniel Weiss
              EZ Link Software

              Comment


              • #8
                RE: How do I count months?

                Simon

                Have a look in Code Archive Mesg # 435 Ira Perlow wrote the perfect function to do just what you want. I have used it and it works great.

                Keith Hubert
                London.
                Regards
                Keith Hubert
                Alpha Guild Member
                London.
                KHDB Management Systems
                Skype = keith.hubert


                For your day-to-day Needs, you Need an Alpha Database!

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