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Summarize Operation

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    Summarize Operation

    I am trying to summarize a database by using numbers that are calculated.

    For instance if the elapsed time =0-1.5 hours then add all of those miles
    if the time is "1.5 but "3.0 then add those miles, etc. I have about 10 differnt ranges I need to compare.


    My formula to get the time is substantial and I put it in the field/expression column of the summarize operation and selected group by. It seems to work, but it groups everything by 1 hour, i.e. 0 1 2 3 4 5 and so forth. I have no way of specifying a range.

    I tried to input a second grouping so I could specify a range but it made the summarize formula too long and it errored out. Anyone have any experiences with this?

    #2
    RE: Summarize Operation

    A couple of thoughts:

    First, if the time ranges are consistent (0-1.5,1.5-3,3-4.5 etc.), you could use the FLOOR() function:

    FLOOR(FIELD_NAME/1.5)

    This will return the lowest integer. For example, 2.3/1.5 = 1.53, and FLOOR(1.53) = 1.

    If the ranges are not consistent, you might consider adding a field to your table, make it a calc field to equal your expression, and then use it in your summarize. This would be simpler than trying to incorporate the expression into the summarize.

    Comment


      #3
      RE: Summarize Operation

      I am not sure I quite understand. The ranges are consistent. .5-1.0 1.0-1.5 1.5-2.0 etc. I would like to summarize by these values.

      Comment


        #4
        RE: Summarize Operation

        Hi John,

        I had a similar situation that was eventually solved with SELECT/CASE. I am sure yours will also.

        es

        Comment


          #5
          RE: Summarize Operation

          After giving it more thought, here's what I'd do:

          Create a new field in your table. Make it a calc field with this expression:

          FLOOR(FIELD_NAME*2)/2 where FIELD_NAME is the field that has the value that you want to summarize.

          Here are some examples of values you will get:

          FIELD_NAME NEW_CALC_FIELD

          .6 .5
          .8 .5
          1.2 1.0
          1.6 1.5
          1.9 1.5

          In other words, the various values of FIELD_NAME will always return a value at the bottom of the range. Then, you can run a report or summarize operation grouping your results on NEW_CALC_FIELD.

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