What is the role of the Update method in a DataAdapter?
- Adds new rows to the DataSet
- Clears all data from the DataSet
- Executes an SQL statement to retrieve data from the database
- Propagates changes from a DataSet back to the database
The role of the Update method in a DataAdapter is to propagate changes made within a DataSet back to the underlying database. After modifying data within the local DataSet, such as adding, updating, or deleting rows, the Update method is called to synchronize these changes with the corresponding data in the database. This involves generating and executing appropriate SQL statements, such as INSERT, UPDATE, and DELETE, to reflect the modifications made in the DataSet back to the relevant database tables. By invoking the Update method, the DataAdapter ensures consistency between the application's data and the database, facilitating data persistence and integrity.
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