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Append to sql from dbf

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  • Append to sql from dbf

    I currently have an append to sql from dbf using a standard append operation to an active link table. This is slow & am sure would be quicker with an sql insert.
    what is the basic outline of the code to achieve this.
    Thanks

  • #2
    Use AlphaDAO to insert records to your SQL database. First, create a named connection string (Click on "Tools"->"External Databases"->"AlphaDAO Connection Strings"). Sample code below.

    HTML Code:
    dim args as sql::arguments
    args.Add("my_field1", value1)
    args.Add("my_field2", value2)
    args.add("my_field3", value3)
    
    dim sql_command as C = "INSERT INTO my_table_name (my_field1, my_field2, my_field3) VALUES (:my_field1, :my_field2, :my_field3)"
    
    ' connect to database
    dim cn as sql::Connection
    if .not. cn.open("::Name::ConnectionStringName")
         if cn.CallResult.text <> ""
              ui_msg_box("", cn.CallResult.text)
         else
              ui_msg_box("", "Connection failed." )
         end if
    end if
    
    ' execute query
    if .not. cn.execute(sql_command, args)
         ui_msg_box("", cn.CallResult.text)
    elseif cn.CallResult.RowsAffected = 1
        ui_msg_box("", "successful")
    end if
    
    ' close connection
    if cn.IsOpen
         cn.Close()
    end if

    You may download the attached sample workspace. It shows how to interact with AlphaDAO database (select, insert, update, delete).
    Attached Files
    Last edited by Roland; 06-26-2020, 03:04 PM.
    Create windows desktop applications using pure web components.

    Visit https://a5wd.com and download our Alpha Anywhere Library.

    Comment


    • #3
      Presumably there is no append function so I have to wrap this in fetching through the records if the dbf
      Thanks

      Comment


      • #4
        Does this need to be automated or with manual intervention?
        You could export to Excel and import to the Sql Table.
        Ted Giles
        Example Consulting - UK
        .

        sigpichttp://ec12.example-software.com//
        See our site for Alpha Support, Conversion and Upgrade.

        Comment


        • #5
          Automatically append all or some of the records from the dbf to the sql plus also not all fields
          i will actually be taking data from 15 dbf’s to 1 sql

          Comment


          • #6
            Alpha is pretty quick about creating text files.
            I would then use load data to import the text file to the sql table.
            Special note, if you are use MS SQL, you will have to get the text file to the sql server machine.
            You would not have that same limitation using mySQL.
            Gregg Schmidt

            Comment


            • #7
              Here's a snippet that should get you started. Search the docs for ResultSetFromDBF and InsertData.

              dim conn as SQL::Connection
              dim rs as SQL::ResultSet

              tbl = table.open("local")
              'query.filter = "Doc_ID = 3"
              'tbl.query_create()
              rs = conn.ResultSetFromDBF(tbl)

              if .not. conn.InsertData("", "local_test", rs)
              ui_msg_box("Error", "Could not insert data into back-end table" + crlf()+ conn.CallResult.text)
              conn.close()
              end
              end if

              tbl.close()
              conn.close()

              Comment


              • #8
                It looks like resultsetfromdbf would require structure / naming of dbf & sql to match, which is not the case for me.
                Thanks

                Comment


                • #9
                  Seing as you are stuffing many dbf's (tables or whole databases?) into one SQL table, why not build - and I am assuming you meant Tables - a new composite table in Alpha and then just upsize it?.
                  If you really meant 15 databases you could still do it that way in just one workspace.
                  Ted Giles
                  Example Consulting - UK
                  .

                  sigpichttp://ec12.example-software.com//
                  See our site for Alpha Support, Conversion and Upgrade.

                  Comment


                  • #10
                    Yes 15 dbf tables into 1 sql table for all sorts of searching & reporting including online
                    The new 1 sql table
                    will is built populated - currently using append operation but it is slow
                    will be rebuilt periodically (once a week)- currently deletes all records & is using append operation but it is slow
                    on the save of a new record in one of the 15 tables the 1 sql table will have new record added - currently using sql insert function that is quick but needs a manual list of the 100 fields taking time to create the script/fieldsValuePairs
                    on the change of a record in one of the 15 tables the 1 sql table will be updated- currently using sql update function that is quick but needs a manual list of the 100 fields taking time to create the script/fieldsValuePairs
                    I have a similar system for a different collection of tables all built & working well, all, in dbf but as I am in the slow process of moving to sql am going this route - also part of the learning curve

                    If there is a quicker method i am open to suggestions

                    Comment


                    • #11
                      Hi Terry,
                      We used a third party product https://www.spectralcore.com/databases/dbf to export dbf tables from DBF to MSSqlserver as part of overnite process. It was called as a scheduled process and generated a script which was executed on the sql server. Similar third party products are available but you might need to check support for memo fields etc if used.
                      https://appsbydesign.co.uk/

                      Comment


                      • #12
                        I have changed to
                        The new 1 sql table
                        is built / populated - using fetch through dbf table records using sql insert function for each record, this is perhaps 10 times faster than append to active link
                        will be rebuilt periodically (once a week) - currently deletes all records in SQL & is using fetch through dbf table records using sql insert function for each record, this is perhaps 10 times faster than append to active link
                        on the save of a new record in one of the 15 tables the 1 sql table will have new record added - currently using sql insert function that is quick but needs a manual list of the 100 fields taking time to create the script/fieldsValuePairs
                        on the change of a record in one of the 15 tables the 1 sql table will be updated- currently using sql update function that is quick but needs a manual list of the 100 fields taking time to create the script/fieldsValuePairs

                        The only issue i am really left with is the laborious task of setting up the fieldValuePairs as these also differ between the dbf's

                        Thanks for the help

                        Comment


                        • #13
                          Well I'm glad you have a workable solution, but - and you won't want to hear this - you will have to migrate to SQL at some time and build an OLAP Cube for reporting and searches I suspect.
                          I have built them for reporting purposes in Alpha where there was specific reporting and search requirements in a complex data set of 3 million records. Built the Cube overnight. Cuts down on traffic enormously.
                          Still, you have a working option and that's the main thing.
                          Ted Giles
                          Example Consulting - UK
                          .

                          sigpichttp://ec12.example-software.com//
                          See our site for Alpha Support, Conversion and Upgrade.

                          Comment

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