sql http://mono.software/2017/07/13/missing-incorrectly-set-up-and-unused-indexes-and-their-impact-o

Posted 2021-05-13

SELECT
    objects.name AS TableName,
    indexes.name AS IndexName,
    dm_db_index_usage_stats.user_seeks AS UserSeek,
    dm_db_index_usage_stats.user_scans AS UserScans,
    dm_db_index_usage_stats.user_updates AS Writes
FROM
    sys.dm_db_index_usage_stats
    INNER JOIN sys.objects ON dm_db_index_usage_stats.OBJECT_ID = objects.OBJECT_ID
    INNER JOIN sys.indexes ON indexes.index_id = dm_db_index_usage_stats.index_id AND dm_db_index_usage_stats.OBJECT_ID = indexes.OBJECT_ID
WHERE
    indexes.is_primary_key = 0
    AND --remove to show all unused indexes
    dm_db_index_usage_stats.user_updates <> 0
    AND
    dm_db_index_usage_stats.user_seeks = 0
    AND
    dm_db_index_usage_stats.user_scans = 0
ORDER BY
    dm_db_index_usage_stats.user_updates DESC