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Updating child records ado

updating child records ado-49

In the next section we will take a closer look at ADO's batch updates, what they can offer you, and why they are so important.However, in this section you won't need them to solve the problem of updating a join, because in ADO, joins are naturally updatable.

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If you run it, you can edit one of the fields and save the changes (by moving off the record).(Table1 copy from ADOQuery the selected record) procedure TForm1Button7Click(Sender: TObject); SQL. The actual update is performed when you call post (or not even then, it depends if the Batch Updates are on or off). It would be far more efficient to use SQL statements (INSERT) in order to insert the data to the other table SQL. Introduction In this article I am performing simple operations like save, delete, update and search operations in a Windows Forms application. In the finally block I am closing the Sql Connection by the Close() method. In this example my database name is "STUDENT" and database table is "student_detail" which has four columns as "roll_no", "s_name", "age" and "course". Then I am calling the Execute Non Query() method in a try block.You should use batch updating with either a keyset or static cursor only.

If the attempt to transmit changes fails for any or all records because of a conflict with the underlying data (for example, a record has already been deleted by another user), the provider returns warnings to the Errors collection and a run-time error occurs.

I´m trying to copy data from one master table and 2 more child tables.

When I select one record in the master table I copy all the fields from that table for the other. Add('Where numeracao LIKE ''%' NInterv.text);// locate record selected in Table1 NInterv.text) Open; // iniciate copy of record´s begin while not table ADoquery.

Post; table2.next;/// end; end; The fields will all be updated at the same time.

The way I know to achieve this with security is executing all this updates (or inserts, a.s.o.) using SQL commands inside a transition.

If the Recordset object supports batch updating, you can cache multiple changes to one or more records locally until you call the Update Batch method.