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copying all the records from one table to another

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  • copying all the records from one table to another

    Hi Forum

    Is it possible to copy all the records from one table to another in one action, I can copy single records one at a time no problem.

    But was looking for a way to copy all the records at once then delete the all the records from the first table so it can be populated again with new records.



  • #2
    Re: copying all the records from one table to another

    Don't know if yours is an sql database of some kind. If so, seems like executing something similar to the following 2 sql statements in Xbasic callback might work:

    To insert all records from TableA into TableB:

    To delete all records from TableA:
    DELETE TableA.* FROM TableA

    If yours is an sql type database, the Alpha article at: http://www.downloads.alphasoftware.c...SQLTables.html could help.
    Try finding 'Executing Insert, Updates and Deletes' on that page.
    Carol King
    Developer of Custom Homebuilders' Solutions (CHS)


    • #3
      Re: copying all the records from one table to another

      Hi Carol

      Yes I am using SQL connection, I will try it out when i get back to the office

      Thanks Again



      • #4
        Re: copying all the records from one table to another

        There's some good info in that article about making sure your insert query executed properly. In your case, I would think you would want to check that your records did get inserted into the other table before deleting them.
        Carol King
        Developer of Custom Homebuilders' Solutions (CHS)


        • #5
          Re: copying all the records from one table to another

          to add a bit to what Carol has said -

          INSERT INTO TableB SELECT TableA.* FROM TableA
          works if the columns in TableA and TableB are identical and in identical sequence

          INSERT INTO TableB (Col1, Col3, Col 2, ...) Select Col1, Col2, Col3, ... from TableB
          works if the columns in TableA and TableB are not identical or in identical sequence
          MSQL since 2010
          A5V11 since Feb 2012


          • #6
            Re: copying all the records from one table to another

            I wondered whether to say that, too, Marion. There's always the 'works if', right?
            Carol King
            Developer of Custom Homebuilders' Solutions (CHS)


            • #7
              Re: copying all the records from one table to another

              I am using this bit of code when I am uploading data from Excel into a table.

              dim cn as sql::Connection
              dim sql as c
              dim vinfo as c

              sql = "DROP TABLE technosis_old;"
              vinfo = cn.execute(sql)
              sql = "CREATE TABLE technosis_old LIKE technosis;"
              vinfo = cn.execute(sql)
              sql = "INSERT technosis_old SELECT * FROM technosis;"
              vinfo = cn.execute(sql)
              sql = "truncate technosis;"
              vinfo = cn.execute(sql)
              PrepareTechnosisLoad = "alert('Unable to connect to the Database';)"
              END IF

              the code is:
              1. deleting the previous 'old' copy of the table
              2. creating a new 'old' table based on the original table
              3. filling the new table with the values from the original
              4. deleting the content of the original one

              and after that filling the original one with the data from excel.
              Last edited by JimDK; 03-10-2012, 11:19 AM.


              • #8
                Re: copying all the records from one table to another

                Hi Jim

                Thanks, I will give this a go along with the other suggestions

                Thanks Again