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If the statement does exist in memory, Oracle Database can reuse it and skip the task of parsing and optimizing the statement.Using bind variables makes the statement reusable with different input values. In some cases, you may use a query designer to help create a query, and run the query at design time to see example data.By running the query, you create the dataset field collection.

Get Changes() If changes Is Not Nothing Then Data Adapter. I need to store a data table, that will get adding rows, deleting rows, and rows modified.The way the architecture works with the Data Adapter is that you can make any changes you want to the filled Data Set, and it won't affect the database until you call the Update method.When Update is called, the Data Adapter will attempt to execute each query (UPDATE, INSERT, DELETE) on every row of the Data Set that has been updated, inserted, and deleted.For example, if you call Delete on a row on the Data Set, then when Update is called on the Data Adapter, the Delete Command of the Data Adapter will be called using the particular row in the Data Set.Note: Keep in mind that this Update is different than a SQL UPDATE statement.

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