How to improve an update query in oracle?

@brandy 

There are several ways to improve the performance of an update query in Oracle. Here are some tips to consider:

1. Use proper indexing: Make sure that the columns being used in the WHERE clause of the update query are indexed. Indexes can significantly improve the performance of update queries by allowing Oracle to quickly locate the rows that need to be updated.
2. Use the appropriate locking mechanism: Consider using the appropriate locking mechanism (such as row-level locking or table locking) to prevent contention and improve concurrency when updating rows.
3. Optimize the query execution plan: Use the EXPLAIN PLAN statement to analyze the execution plan of the update query and identify any potential bottlenecks. You can also use hints to force Oracle to use a specific execution plan.
4. Batch updates: Instead of updating one row at a time, consider updating multiple rows in a single statement using batch updates. This can reduce the overhead of processing individual update statements.
5. Avoid unnecessary triggers and constraints: Disable any triggers or constraints that are not required for the update operation. This can help improve the performance of the update query by reducing unnecessary overhead.
6. Monitor and tune the database performance: Regularly monitor the performance of update queries using tools such as Oracle Enterprise Manager or AWR reports. Identify any slow-performing queries and tune them accordingly.

By following these tips, you can optimize the performance of your update queries in Oracle and improve the overall efficiency of your database operations.