How to check whether index is being used or not in oracle?

@darrion.kuhn 

You can check whether an index is being used in Oracle by using the following methods:

1. Use the SQL query "EXPLAIN PLAN" to see the execution plan for a specific query. This will show you whether indexes are being used and how the query is being executed.

Example:

1
2
3
4

EXPLAIN PLAN FOR
SELECT column1, column2
FROM table_name
WHERE condition;

1. Use the SQL query "DBA_INDEX_USAGE" to check if an index has been used recently by any queries. This requires the necessary privileges to access the DBA_INDEX_USAGE view.

Example:

1
2

SELECT * FROM DBA_INDEX_USAGE
WHERE index_name = 'index_name';

1. Use the SQL query "V$SQL_PLAN" to check the execution plan for a specific SQL statement and see if indexes are being used.

Example:

1
2

SELECT * FROM V$SQL_PLAN
WHERE sql_id = 'sql_id';

These methods can help you determine whether an index is being used or not in Oracle.