10. Understanding ODBC Connectivity : ODBC Programming : Scrollable Cursors : Keyset-driven Scrollable Cursors
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Keyset-driven Scrollable Cursors
Keyset-driven cursors allow updates to selected records in the result set. Keyset-driven cursors require the target tables to include unique primary keys. If an attempt is made to update or delete records in a result set, and the corresponding records in the target table have been deleted, an error may be returned, depending on the transaction isolation level.
Keyset-driven cursors can be used within a read-only context, but do not perform as well as static cursors.