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The UPDATE portion of the code works in an identical fashion to the Implicit Cursor Loop, so this is not really a separate "UPDATE" method as such.The interesting thing about this method is that it performs a context-switch between PL/SQL and SQL for every FETCH; this is less efficient.Patch sets contain the same set of generic fixes across all platforms.Patch sets may also include additional patches specific to the platform on which they are released.

I worry about how ETL tools apply updates (did you know Data Stage applys updates singly, but batches inserts in arrays? The two most common forms of Bulk Updates are: Case 1 is uninteresting.

The SQL code equivalent is (from here): and check if it’s for a duplicate entry (my identifier field has a primary key — unique — constraint).

Have you tuned that SQL statement so that it effeciently pulls the data out of the database? Take the COMMIT out of the loop and see if that helps your performance.

Oracle provides the FOR UPDATE clause in SQL syntax to allow the developer to lock a set of Oracle rows for the duration of a transaction.

The syntax of using the WHERE CURRENT OF clause in UPDATE and DELETE statements follows: WHERE [CURRENT OF cursor_name | search_condition] The following example opens a cursor for employees and updates the commission, if there is no commission assigned based on the salary level.




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