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incorrect formula

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    #1

    incorrect formula

    I want to find out the total number of men who came to our center between 2 dates. This is what I figured out,but when I try to insert this formula into a report foooter, it tells me the function is incorrect. What am I doing wrong? Thanks
    tablecount("Intake.dbf","Gender='M'") .AND.tablecount("Daily.dbf","between(Daily"Date,{"+dtoc(date1)+"},{"dtoc(date2)+"})")
    Tags: None
    #2
    RE: incorrect formula

    Now that I look at it, I can see it is wrong, but I still don't see how to get a total of all the records that have to meet 2 requirements. Ed

    Comment

      #3
      RE: incorrect formula

      If you are trying to add the two counts together I think the only problem is that

      between(Daily"Date

      should be

      between(Daily-"Date

      If you are trying to count items common to both tables, we have some more work to do.
      There can be only one.

      Comment

        #4
        RE: incorrect formula

        Actually combining the two counts would be

        + tablecount("Daily.dbf","between(Daily-"Date

        but I don't think that's what you want.....
        There can be only one.

        Comment

          #5
          RE: incorrect formula

          Thanks for your thoughts. What I want to to find the total of all the people who are in both groups at once, i.e. men who got service between June and October of 2004. I think I need to take out the second tablecount(), but writing the filter from a parent table for the gender and the child table for the date is making my brain hurt. Thanks Ed

          Comment

            #6
            RE: incorrect formula

            You can't use tablecount() on two tables at once or even a set, so don't waste your time.

            You might post a small sample of the two tables to experiment.
            There can be only one.

            Comment

              #7
              RE: incorrect formula

              Thanks for your interest. This is a very simple database we use at our Homeless drop-in center. The parent table is demographic, name, age, race, education level, etc. There is a one field child table that just has the dates that each person comes to the center. I would like to do a report that says that for a span of dates, that we had so many Hispanics, so many African-Americans, so many Men, so many women, etc. Tablecount won't work on a set. I can write a whole series of reports that group on race or sex or whatever and print totals. It just seems that I should be able to have one report that where I can place fields that summarize the demographic data for a date span. Ed

              Comment

                #8
                RE: incorrect formula

                Edward, this will be very easy if you create a new set using the same tables. Invert the present relationship. Use one to one link. Base your report on the new set. Filter it the way you need. -- tom

                Comment

                  #9
                  RE: incorrect formula

                  You must have gathered that logic is not my strongest suit. I understand that inverting the relation allows me to filter the records by date, but I still can't use tablecount() to get the total Hispanics or females or whatever. What do I put in the report footer to get those totals or do I have to use count()on groups in the report? Thanks for the help. Ed

                  Comment

                    #10
                    RE: incorrect formula

                    Make a calculated field, something like

                    c_count = if(somefield = Hispanic .AND. somedate "= var-"date1 .AND. somedate "= var-"date2, 1, 0)

                    Then in the report footer, you can have a

                    calculated Total on c_count.

                    Comment

                      #11
                      RE: incorrect formula

                      Does that work :)

                      Comment

                        #12
                        RE: incorrect formula

                        Ed, on closer reading of your description of your ultimate goal I think you're going to have to do considerable processing before you generate a consolidated report of the type you have in mind. To compile these statistics you will have to step through all the records in the inverted set more than once. Each time you compute your totals you could copy them to a separate table. This separate table would be the foundation for the report. At present you can't do the kind of totals you need simply by grouping your records or by filtering them. Your categories overlap. Hispanics include females and males, for example. Doing this with a series of carefully crafted tablecount() expressions might be feasible, but I'm not sure you gain much doing it that way. Alpha is still going to have to step through the table a bunch of times in order to compute all the totals.

                        -- tom

                        Comment

                          #13
                          RE: incorrect formula

                          Tom, I am disturbed by your answer. What I need seems like the most ordinary of database tasks. I just want a series of totals of the limited number of possibilities in each field. It is sort of like a crosstab, only there seems to be no field I can use there as the central field as in the example. Forgetting about the complexity of the date field, should there be some simple way of putting this together? Ed

                          Comment

                            #14
                            RE: incorrect formula

                            Edward,

                            Did you not see my response in Msg ID: 79971?

                            Just make separate calc field for each condition you need to
                            "count" and have a total on each separate calc.

                            Comment

                              #15
                              RE: incorrect formula

                              Mr. Davidson. I was responding to Tom Cone's answer, which seems to suggest that these ordinary tasks are not something that Alpha can readily do. I will certainly be trying your idea and I am eager to make it work. Ed

                              Comment

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