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Combine 2 tables

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    Combine 2 tables

    I have 2 offices. Data is input at both locations. Once a week I would like to combine them into one. Then they both could have the same info on monday. All records have a common character field with the client#. I would want the final (combined) table to keep all client names, but to save the most recent record. Typical changes are phone #'s, addresses. There is a date field which auto records the last change date. It needs to combine all, exclude older duplicates, exclude one of the duplicates when no change has taken place, and finally add to the new table any new client records. Can this be done without brain damage? There are about 20 fields per record.
    Rich Mooney

    RE: Combine 2 tables


    Synchronizing the same table, maintained at two locations, can be both frustrating and perplexing. Here are some ideas for you:

    1) You could create a new logical field in the table and arrange to automatically set it true whenever a record is entered (new) or changed. Once a week you could query the table for all records where this new 'flag' field is True, and then copy these records to a temp table that would then be appended (overwrites enabled) at the other location. Before doing the append the flag field in each temp table record would be set 'false'. The second office would follow the same pattern on its end, sending only changed or new records to the first office. The two tables will be synchronized until someone at either end starts deleting records! Naturally, to prevent unwanted duplications the flag fields would have to be reset to 'False' after each temp table is created. You should also verify that the 'flag' field doesn't get set true when records from the other office are appended.

    2) An alternative would be to create a new field in the table to record the time when the record was last modified. You could copy both tables to a third table, and then sort the combined table using a special index. The index would establish a sort sequence based on the date and time the records were last modified (most recent at top of list, oldest at bottom). A delete duplicates operation run against this table should delete the superseded records, leaving the more recent records intact.

    -- tom


      RE: Combine 2 tables

      To clarify option (2). The index in the new table would be sorted in order (ascending) by:


      I omitted the 'client' in the previous message, and while it was probably obvious, felt it best to state it explicitly.

      -- tom


        RE: Combine 2 tables

        Thanks Tom, I'll probably try the second version. Rich