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Multiple records from one table into one record in a new table.

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    #1

    Multiple records from one table into one record in a new table.

    Ok, third time is a charm

    Hopefully the title explained a little of what I am trying to do but when re-posting it here I screwed up again so forgive me.

    I wish I could just delete the other threads. Anyway. (done)

    I have a app that uses a product catalog that contains products from several suppliers. These items get updated twice a year by the suppliers and they release those updates in a Excel format. The problem is their format is not compatible with the way I need the data laid out for a record in the catalog.dbf table. They will have multiple rows in the Excel file for the same item. Each row will contain a option for that item and a price. My app needs to look at one record for the item that contains all options and prices. So for now I have be manually in Excel reformatting sometimes 2000 rows into a format I can import.

    I am sure I can use the tbl.enter_begin() method to write each record into the new table.

    Given that the style number will be the same in the table I create from the suppliers Excel files my thinking is I should be able to read each record that contained the current style number and read the sizes, color group and price for each variation for the style number and write them into variables. Then using the tbl.enter_begin() write the contents of those variables into the new table under one record. Then keep repeating this until all records have been read out of the table created of the supplier Excel files.

    My problem is I cannot find a good way to keep reading records in the Excel created table until all options and prices for that style have been read into variables that can be writne into one record of the new table.

    I know there is a lot of logic I will need to build into the script but I do not think that will be a problem. Just need to figure out how to keep reading records in one table until I have all the info to write a new record in a new table.
    Attached Files
    Last edited by Al Buchholz; 01-18-2013, 04:38 PM. Reason: posts merged from other threads
    Tags: None
    #2
    Re: Multiple records from one table into one record in a new table.

    Your samples are spreadsheets, not the tables after you have imported them into Alpha.

    In general what you want to do is open the source table, read the field value of the field that repeats, store that in a variable.
    Next you begin a while loop that processes the whole table (.not. tbl.fetch_eof())
    Inside that while loop you have another while loop that proceses records while the repeating field value stays the same and the end of the table is not encountered (tbl.somefield = your_variable .and. .not. tbl.fetch_eof()).

    If you have blank records in the source table you will have to code to skip over them until the next repeating value is encountered which you will then use to update the variable and loop back to the start of the first while.
    There can be only one.

    Comment

      #3
      Re: Multiple records from one table into one record in a new table.

      Stan. I was looking at the WHILE .not. tpi.fetch_eof() as a possible way of doing it. My thoughts are to put something like "Next" in the table in the style field that I was trying to read from. Since I am trying to pull all the data associated with a style I think using the "Next" in the style field would be a way to end the WHILE .not. tpi.fetch_eof().

      I will convert those spreadsheets to example tables later today and may even include some of my code thinking. I know this can be done so I just need to figure out the best way to do it because I really do not want to go through 10000+ rows in a Excel file and hand reformat them. A little dress up prep is fine, just not having to do a total reformat by hand.

      Comment

        #4
        Re: Hopefully the title explained a little of what I am trying to do

        Hi Preston,

        Providing you and your supplier are using the same Id/Ref codes for each product, I would suggest you import the records to a temp table and then do your posting to the working table from there.
        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

          #5
          Re: Hopefully the title explained a little of what I am trying to do

          Hey Keith,


          I plan on importing the supplier data into a temp table and then working from there. I am just trying to figure out the best way and how to do it.
          Last edited by Al Buchholz; 01-18-2013, 04:37 PM. Reason: posts merged to a single thread.

          Comment

            #6
            Re: Hopefully the title explained a little of what I am trying to do

            Also note that within the inner loop (specifically the one Stan refers to as "tbl.somefield = your_variable")
            you will need conditions for which field in the new table to place the value for that record (of the original table).

            I have written code for similar. - where records down convert to fields across.
            If it is very clean and your fieldnames in the new table match a value in the original, you could use crosstab operation.

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