scripts-index_monitoring_on (schema)

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SPOOL temp.sql

SELECT 'ALTER INDEX "' || i.owner || '"."' || i.index_name || '" MONITORING USAGE;'
FROM   dba_indexes i
WHERE  owner      = UPPER('&1')
AND    table_name = DECODE(UPPER('&2'), 'ALL', table_name, UPPER('&2'));

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SET PAGESIZE 18
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@temp.sql