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searching specific records

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  • searching specific records

    I have a question, I am fairly new to databases and my associate and I are wondering if it is possible to run a search against a set of records to determine where only one field is different from the other fields. In other words where only one field has a different value from the other records, but where the other fields the values are the same. While not looking for only one field but looking at all the records to show which have one specificly different field. He seems to think this is a mathematical equation that has to be run in excel. If you have any input on this it would be greatly appreciated, or if you know how to configure this and would be able to help us out we would be interested. Thank You.
    Jerrod Sand

  • #2
    Re: searching specific records

    It should be possible to write some looping code to do what you want. I'm not clear on what that is.

    Check each record and see if one field is different from others in the same record?
    Check all records and see if one field in one record is different than the same field in all the other records (find a unique value)?
    There can be only one.


    • #3
      Re: searching specific records

      Sorry I am not very good at describing exactly what I mean yet as far as terminology. Actually to find a unique value in one field among several records where certain other fields are all of the same value as the other records. Such as where fields are "color" "size" "weight" and lets say I want to know where the records have the same value in "color" and "weight" but only one record has "size" as a different value than the other records. or where ONLY ONE record has a different value in "color" and "size" and "weight" are all the same values for all the records. Although it would be on a much larger field list that I would be running the code. It would be very important that the records match all other fields and have ONLY ONE field that has a unique value to the other records and be able to determine what that is and I guess filter the records based on which field I wanted at the time.
      If this makes more sense..... Let me know if you have any ideas on how this could be done please. Thank You.
      Jerrod Sand


      • #4
        Re: searching specific records

        I'm old and slow. You're going to have to break it down into steps.

        "among several records" - You want to filter for something these several records have in common and then check the records that are selected?
        There can be only one.


        • #5
          Re: searching specific records

          Thanks Stan for taking a look, Yes it would be from records maybe of a certain date time frame. (like from 1-1-10 through 4-1-10) or maybe against any records from the same town. Then to find if any of them have ONE and ONLY ONE value that is different in ONLY ONE field from the other records but not necessarily any specific field. But to tell us if ANY of the fields have ONLY ONE record with ONE unique value that makes that record different from the other records.
          Jerrod Sand


          • #6
            Re: searching specific records

            A brute force solution to this would be to examine one field at a time.

            Loop through all the records to see if there is a unique field value present in field1. If so, you've found a "candidate" solution. Otherwise, move to field2 and loop through them to see if there's a unique value there.

            Once a "candidate" solution is found loop through remaining fields in the table to confirm that there are no other unique values present in the "candidate" record.

            this task is not for the fainthearted, and may take more time than volunteers can afford to donate.

            -- tom


            • #7
              Re: searching specific records

              OK Tom thanks for your input, I have an idea of what you are saying, I don't know what you guys mean by "loop" You are getting what I am trying to say, I have another idea, would maybe a visual approach be a good idea? such as if the records are one value then they will be in red font and if they are another value then they will be in green font or shading? From within the aplha side or possibly a way to shade or font color colunms when they are all the same? Or maybe a better approach would be to pick out records that do not meet all criteria given? But maybe that won't work, because we are looking to find records that have ONLY one field value that does not match.
              Jerrod Sand


              • #8
                Re: searching specific records

                Depending how big each recod is, something I have done in the past is to concatenate the fields and use Soundex to see if there were any differences. That may identify the records you want.
                Another way is to Join two tables - you may need to copy the ones you want to work with - and only include the records which are different in the result?
                Having said all that, if you are looking for records with only ONE field that doesn't match, does that mean that if you have recods with more than one mismatch you are not interested?
                Ted Giles
                Example Consulting - UK

                See our site for Alpha Support, Conversion and Upgrade.


                • #9
                  Re: searching specific records

                  Correct if there are more than one field that does not match we are not interested in that record only the ones that have only one field that does not match.......I know....crazy right.
                  Jerrod Sand