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Count Days In-between Two Date Fields In Report

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    Count Days In-between Two Date Fields In Report

    I am trying to figure out how to count the number of days in between two date fields by using a calculated field in a report. I can simply use Date2 - Date1 to get my result but it always 1 day short so I added Date2-Date1 + 1 and it gets me my results but if there is not any dates in the Date1 and Date2 fields then it returns "1" and I want the field to just be null. I am thinking it will be a If/Then statement but cant figure it out for a reports calculated field.

    Any Help Would Be Great.

    #2
    Re: Count Days In-between Two Date Fields In Report

    Originally posted by tommyrotten View Post
    I am trying to figure out how to count the number of days in between two date fields by using a calculated field in a report. I can simply use Date2 - Date1 to get my result but it always 1 day short so I added Date2-Date1 + 1 and it gets me my results but if there is not any dates in the Date1 and Date2 fields then it returns "1" and I want the field to just be null. I am thinking it will be a If/Then statement but cant figure it out for a reports calculated field.

    Any Help Would Be Great.
    Try
    if(dtoc(date2)<>"" .and. dtoc(date1)<>"",date2 - date1 + 1,"")
    Last edited by madtowng; 10-30-2010, 07:51 PM.
    Gregg
    https://paiza.io is a great site to test and share sql code

    Comment


      #3
      Re: Count Days In-between Two Date Fields In Report

      Thanks but that did not work as well. I loaded that into the expression builder and it would not save, as it said the expression is not valid. Ill do some research on "dtoc" and see if I can get somewhere from there.

      Comment


        #4
        Re: Count Days In-between Two Date Fields In Report

        if(dtoc(date2)<>"" .and. dtoc(date1)<>"",date2 - date1 + 1,0)
        Al Buchholz
        Bookwood Systems, LTD
        Weekly QReportBuilder Webinars Thursday 1 pm CST

        Occam's Razor - KISS
        Normalize till it hurts - De-normalize till it works.
        Advice offered and questions asked in the spirit of learning how to fish is better than someone giving you a fish.
        When we triage a problem it is much easier to read sample systems than to read a mind.
        "Make it as simple as possible, but not simpler."
        Albert Einstein

        http://www.iadn.com/images/media/iadn_member.png

        Comment


          #5
          Re: Count Days In-between Two Date Fields In Report

          Originally posted by Al Buchholz View Post
          if(dtoc(date2)<>"" .and. dtoc(date1)<>"",date2 - date1 + 1,0)
          That worked but it is still returning 1 and not 0 when it evaluates. If i remove the "+ 1" out of the equasion then it evals to "0" as it should. I am thinking that it does not like the "+ 1"

          But thank you for the help. I am going to use it and try to work out the + 1 issue in spare time.

          Comment


            #6
            Re: Count Days In-between Two Date Fields In Report

            dtoc() on an empty date field yields
            Code:
            "  /  /    "
            Try
            Code:
            if(date2<>{} .and. date1<>{},date2 - date1 + 1,0)
            Tim Kiebert
            Eagle Creek Citrus
            A complex system that does not work is invariably found to have evolved from a simpler system that worked just fine.

            Comment


              #7
              Re: Count Days In-between Two Date Fields In Report

              Originally posted by Tim Kiebert View Post
              dtoc() on an empty date field yields
              Code:
              "  /  /    "
              Try
              Code:
              if(date2<>{} .and. date1<>{},date2 - date1 + 1,0)
              That did it. Thank you very much :D What is the theory behind using {}. I am trying to learn as I program and would love to know.

              Comment


                #8
                Re: Count Days In-between Two Date Fields In Report

                Your welcome.

                The {} are used to express date values in xbasic the same way quotes are used to express character. So "" means an empty string. And {} means an empty date.

                Code:
                dim d1 as d
                d1 = {01/01/2001}
                
                ?d1
                = {01/01/2001}
                
                d1={}
                ?d1
                = {  /  /    }
                Tim Kiebert
                Eagle Creek Citrus
                A complex system that does not work is invariably found to have evolved from a simpler system that worked just fine.

                Comment


                  #9
                  Re: Count Days In-between Two Date Fields In Report

                  if(remspecial(dtoc(date2))<>"" .and. remspecial(dtoc(date1))<>"",date2 - date1 + 1,"") or if(remspecial(dtoc(date2))<>"" .and. remspecial(dtoc(date1))<>"",date2 - date1 + 1,0).

                  Your choice if you want "" or 0.
                  Gregg
                  https://paiza.io is a great site to test and share sql code

                  Comment


                    #10
                    Re: Count Days In-between Two Date Fields In Report

                    Tommy
                    Just a fundamental question. I'm interested in your reasoning or the application.
                    In years of programming in many languages (alpha5 I'm pretty new at, but still supporting legacy systems),
                    the date functions return the same. date-date = days between.
                    You want never to return one day.

                    Number of days between say, midday on the 21st and midday on the 22nd is one day , not two.

                    If I did what you ask for a rental agent or hotel they wouldnt have any business.

                    Ray

                    Comment


                      #11
                      Re: Count Days In-between Two Date Fields In Report

                      Originally posted by madtowng View Post
                      if(remspecial(dtoc(date2))<>"" .and. remspecial(dtoc(date1))<>"",date2 - date1 + 1,"") or if(remspecial(dtoc(date2))<>"" .and. remspecial(dtoc(date1))<>"",date2 - date1 + 1,0).

                      Your choice if you want "" or 0.
                      Not if the field is defined as a numeric.... which is what date2 - date1 + 1 will return.

                      Can't have one part of an if return a numeric and the other part a character.
                      Al Buchholz
                      Bookwood Systems, LTD
                      Weekly QReportBuilder Webinars Thursday 1 pm CST

                      Occam's Razor - KISS
                      Normalize till it hurts - De-normalize till it works.
                      Advice offered and questions asked in the spirit of learning how to fish is better than someone giving you a fish.
                      When we triage a problem it is much easier to read sample systems than to read a mind.
                      "Make it as simple as possible, but not simpler."
                      Albert Einstein

                      http://www.iadn.com/images/media/iadn_member.png

                      Comment


                        #12
                        Re: Count Days In-between Two Date Fields In Report

                        Now to push a little further.
                        In a grid, I want the user to have the option of saying "end date = null".

                        I know it won't be that simple, but does anybody know what needs to be entered ? ( I tried <> {})
                        Gregg
                        https://paiza.io is a great site to test and share sql code

                        Comment


                          #13
                          Re: Count Days In-between Two Date Fields In Report

                          Originally posted by madtowng View Post
                          Now to push a little further.
                          In a grid, I want the user to have the option of saying "end date = null".
                          I know it won't be that simple, but does anybody know what needs to be entered ? ( I tried <> {})
                          Hi Gregg (sorry Tommy)
                          Off the cuff I would have thought to try " / / "
                          so I tried the following

                          DIM SHARED date1 as D
                          date1=" / / "
                          ?date1
                          = { / / }

                          So it should work.
                          Ray
                          Last edited by Ray in Capetown; 11-05-2010, 06:35 AM. Reason: to whom

                          Comment


                            #14
                            Re: Count Days In-between Two Date Fields In Report

                            in fact set date1 = "" with nothing (or anything between quotes) makes date1 return { / / }
                            I don't mean to be finickiticular but this is useful (to me too)

                            Comment


                              #15
                              Re: Count Days In-between Two Date Fields In Report

                              Turns out that for what I was trying to accomplish, is null works correctly if that is the only option, but I still want a way to show my users that they can do a combination (ex: is null or 01/31/2010).
                              Gregg
                              https://paiza.io is a great site to test and share sql code

                              Comment

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