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When is a date not a date?

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  • When is a date not a date?

    Hi All,

    I'm a bit confused, (some people say most of the time).

    I did this on the interactive:

    dob={13/06/47}
    b=stod(cyear(date())+right(cdate(dob),4))
    ?b
    = {13/06/2008}

    a=b-date()
    ?a
    = "28"

    x={13/06/08}-date()
    ?x
    = 28

    Why should 'a' be character? b=date therefore date-date should = number the same as 'x'.

    Please dont tell me it has something to do with the air on this side of the pond.
    Regards
    Keith Hubert
    Alpha Guild Member
    London.
    KHDB Management Systems
    Skype = keith.hubert


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

  • #2
    Re: When is a date not a date?

    Keith,

    I ran the code in the interactive and I got a result of numeric 28 for 'a' just as x. It is possible that 'a' was already dimmed as a character left over from previous testing. Try 'delete a' to get rid of it and then see what happens.
    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


    • #3
      Re: When is a date not a date?

      Hi Tim,

      Thanks for getting back on this.

      I have tested the

      I think I better explain what I'm trying to, just so I can put this into context.

      I have a membership application and I want to open a form to show all the members who's birthdays are in the next 31 days.

      The value in field birthday is DOB.

      My first effort was:

      dim count as n
      count=tablecount("members","month(birthday)=month(addmonths(month_start(date()),1))")

      Which works well, but only shows birthdays in the following month, not the for the next 31 days from todays date.

      So I have tried this:

      dim count as n
      count=tablecount("members","addmonths(month_start(date()),1)-stod(cyear(date())+right(cdate(birthday),4)))<=31")
      ERROR: Filter expression not logical

      What I actually need is stod(cyear(date())+right(cdate(dob),4))-date() but that gives me ERROR: Argument is incorrect data type. That why I'm confused as to why STOD seem to give a date but it is not recognised.

      Please advise what I need to get this to give me a count.
      Regards
      Keith Hubert
      Alpha Guild Member
      London.
      KHDB Management Systems
      Skype = keith.hubert


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

      Comment


      • #4
        Re: When is a date not a date?

        count=tablecount("members","month(birthday)=month(addmonths(month_start(date()),1))")
        Just a quick comment on the above: clearly you don't need month_start(), the result of the above expression will be the same with or without it.

        But back to your original question:
        I want to open a form to show all the members who's birthdays are in the next 31 days.
        count=tablecount("members","between(birthday,date(),date()+31")

        Comment


        • #5
          Re: When is a date not a date?

          Originally posted by Keith Hubert View Post
          What I actually need is stod(cyear(date())+right(cdate(dob),4))-date() but that gives me ERROR: Argument is incorrect data type.
          Nothing wrong with that expression if dob is a date field.

          Code:
          dob = {09/22/1950}
          
          ? stod(cyear(date())+right(cdate(dob),4))-date()  
          = 129
          There can be only one.

          Comment


          • #6
            Re: When is a date not a date?

            count=tablecount("members","addmonths(month_start(date()),1)-
            stod(cyear(date())+right(cdate(birthday),4)))<=31")
            Extra parenthesis

            Comment


            • #7
              Re: When is a date not a date?

              Hi Gabe,

              I appreciate your help.

              count=tablecount("members","between(birthday,date(),date()+31")
              I did mention that the birthday value was DOB, so I'm not too sure what this give me?
              Regards
              Keith Hubert
              Alpha Guild Member
              London.
              KHDB Management Systems
              Skype = keith.hubert


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

              Comment


              • #8
                Re: When is a date not a date?

                Originally posted by Keith Hubert View Post
                Hi Gabe,

                I appreciate your help.



                I did mention that the birthday value was DOB, so I'm not too sure what this give me?
                Do you mean the field is called DOB?
                If so,
                Code:
                count=tablecount("members","between(addyears(DOB,age(DOB)),date(),date()+31)")
                I could propbably spend all morning writing many other expressions that will do the same thing.

                Comment


                • #9
                  Re: When is a date not a date?

                  Stan,

                  Thanks for looking at that for me.

                  It seems that after playing around in the Interactive window for a while, it and me get a bit mixed up.

                  I shall try and run that line and test if it gives me the correct count.
                  Regards
                  Keith Hubert
                  Alpha Guild Member
                  London.
                  KHDB Management Systems
                  Skype = keith.hubert


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

                  Comment


                  • #10
                    Re: When is a date not a date?

                    Here is another one:
                    count=tablecount("members","between(date_value(year(date()),month(DOB),day(DOB)),date(),date()+31")

                    Comment


                    • #11
                      Re: When is a date not a date?

                      I like the title of your thread though:
                      When is a date not a date?
                      When you get stood up!

                      Gota shut down the system.. a storm is brewing.
                      Last edited by G Gabriel; 05-16-2008, 09:33 AM.

                      Comment


                      • #12
                        Re: When is a date not a date?

                        OK, here is test app to try and make this work.

                        A form should open fromthe autoexec. I have not put the filter onto the form yet as I wanted to get the autoexec working first.

                        The Birthdays form has a calculated field to show how many days to next birthday.
                        Regards
                        Keith Hubert
                        Alpha Guild Member
                        London.
                        KHDB Management Systems
                        Skype = keith.hubert


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

                        Comment


                        • #13
                          Re: When is a date not a date?

                          Keith:
                          Previousely, you said you wanted those whose birthday is within the next 31 days.

                          Your form has multistate object with the months. What do you want to happen when you choose a month?

                          Comment


                          • #14
                            Re: When is a date not a date?

                            Hi Gabe,

                            I hope your storm has now passed. Thanks for getting back on this.

                            Forget about the Multistate. I just eft that there to show how I calculated the number of days till the next birthday.

                            I'm only interested in making the other form open from the autoexec if there are birthdays in the next 31 days. The base value is the Date Of Birth in the birthday table.
                            Regards
                            Keith Hubert
                            Alpha Guild Member
                            London.
                            KHDB Management Systems
                            Skype = keith.hubert


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

                            Comment


                            • #15
                              Re: When is a date not a date?

                              Easy as pie..

                              Comment

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