In DB2, how can you determine if an index is being used by the query optimizer?
- By reviewing the SQL statements executed against the database, you can identify whether the query optimizer is utilizing the specified index in DB2.
- DB2 provides system views and monitoring tools that allow you to check the utilization of indexes by the query optimizer.
- The usage of an index by the query optimizer in DB2 can be identified by analyzing the execution plan generated during query optimization.
- You can determine if an index is being used by the query optimizer in DB2 by examining the access plan generated for the query.
In DB2, the query optimizer determines the most efficient access plan for executing SQL queries. You can ascertain whether a specific index is being utilized in query optimization by analyzing the access plan generated for the query. This access plan outlines the steps and operations performed by the optimizer to retrieve the requested data. Monitoring index usage by the query optimizer is essential for optimizing query performance and identifying opportunities for index tuning in DB2 environments.
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