Updating odbc

29-Jan-2018 15:18 by 7 Comments

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Is it possible that I have to use SQLEXEC commands - is that the standard way to communicate with an SQL database from VFP? Thanks as always But, of course, all that the above line does is to update the local cursor within VFP. If that's what you want to do, then you have to use SQLEXEC() to send the UPDATE command: in the WHERE clause, because My SQL won't know about RECNO() - of course, you must substitute whatever condition is appropriate here.

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The examples are equally appropriate when using the ODBC-ODBC Bridge, the Easysoft ODBC-Oracle Driver, the Easysoft ODBC-Inter Base Driver, the Easysoft ODBC-RMS Driver or any other Windows ODBC driver. In this document we will use the sample data provided by installing the Easysoft ODBC-ISAM Driver on the target machine, and the Easysoft ODBC-ODBC Bridge Client on the local Windows machine. NET application that connects to our ODBC data source, issues a query then displays the results from that query.

NET introduces is the replacement of the ADO Recordset object with a combination of the is that it has no knowledge of the underlying data source that might have been used to populate it. Native providers are normally provided by the actual database supplier and provide interfaces to specific databases.

The actual interface to the underlying data source is provided by using one of a number of . For example, SQL Server has a native provider available from Microsoft.

In My SQL like in T-SQL the function to create a GUID is NEWID(). It may be okay to fetch 1000 records, but if your data grows you don't want to fetch all data just because a user wants to edit a single customer name. When is one able to use the SQL versions of commands such as UPDATE and DELETE directly, rather than via this extra level of interpretation?

Well, you have understood half of my explanation very well, the code I gave indeed overcomecomes the separation of the cursor and the table, all the properties set make the cursor updatable.

Andrew, you're not the only one who gets confused about that.

The point is that there is a difference between SQL the language, and SQL the database.Take a look at the datasession window, and you'l see the ALIAS() generated. This will also not update cur Result, but only Some.You can now do SQLEXEC with UPDATE-SQL, DELETE-SQL, etc, but that will effect the remote table, not your query result. DBF (unless the cursor is just a filter to the dbf, but that's a special case with fully optimizable queries on single DBFs only, just a side note). Is it perhaps a framework dataaccess object, or did you do that yourself? Remote View Cursors, SQL Passthrough Cursors (you generate with SQLEXEC, as in your code) and/or Cursoradapter Cursors can be made updatable, and in all cases TABLEUPDATE() then is the central function to update remote data.Not any database can understand any VFP code, and you can include usage of VFP commands in SQL.But as you can make cursors updatable you can work on them with VFPs SQL commands, the only additional thing to do is to then update the remote database from the buffered changes via TABLEUPDATE(). I thought that it was a feature of VFP that its statements allow you to apply SQL to a table directly.That was referring to the second part of my explanation about updatable cursors.