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

by darrion.kuhn , in category: MySQL , 2 months ago

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

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1 answer

Member

by rollin , 2 months ago

@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:

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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:

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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:

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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.