Show Unused Indexes SQL Server

get-unused-indexes.sql

-- This query retrieves and suggests unused index information from the DMV (Dynamic Management Views) in SQL Server.
-- It identifies unused or rarely used non-clustered indexes and generates DROP INDEX statements for them.

SELECT TOP 25
    o.name AS ObjectName,
    i.name AS IndexName,
    i.index_id AS IndexID,
    dm_ius.user_seeks AS UserSeek,
    dm_ius.user_scans AS UserScans,
    dm_ius.user_lookups AS UserLookups,
    dm_ius.user_updates AS UserUpdates,
    p.TableRows,
    'DROP INDEX ' + QUOTENAME(i.name) + ' ON ' + QUOTENAME(s.name) + '.' + QUOTENAME(OBJECT_NAME(dm_ius.OBJECT_ID)) AS drop_statement
FROM
    sys.dm_db_index_usage_stats dm_ius
    INNER JOIN sys.indexes i 
        ON i.index_id = dm_ius.index_id 
        AND dm_ius.OBJECT_ID = i.OBJECT_ID
    INNER JOIN sys.objects o 
        ON dm_ius.OBJECT_ID = o.OBJECT_ID
    INNER JOIN sys.schemas s 
        ON o.schema_id = s.schema_id
    INNER JOIN (
        SELECT SUM(p.rows) AS TableRows, p.index_id, p.OBJECT_ID
        FROM sys.partitions p
        GROUP BY p.index_id, p.OBJECT_ID
    ) p
        ON p.index_id = dm_ius.index_id AND dm_ius.OBJECT_ID = p.OBJECT_ID
WHERE
    OBJECTPROPERTY(dm_ius.OBJECT_ID, 'IsUserTable') = 1
    AND dm_ius.database_id = DB_ID()
    AND i.type_desc = 'NONCLUSTERED'
    AND i.is_primary_key = 0
    AND i.is_unique_constraint = 0
ORDER BY
    (dm_ius.user_seeks + dm_ius.user_scans + dm_ius.user_lookups) ASC;