get inused indexes, Sql Server

get inused indexes

--http://www.foliotek.com/devblog/identifying-unused-indexes-in-a-sql-server-database/

-- GET UNUSED INDEXES THAT APPEAR IN THE INDEX USAGE STATS TABLE
DECLARE @MinimumPageCount int
SET @MinimumPageCount = 500

SELECT	Databases.name AS [Database], 
        object_name(Indexes.object_id) AS [Table],					
        Indexes.name AS [Index],		
        PhysicalStats.page_count as [Page_Count],
        CONVERT(decimal(18,2), PhysicalStats.page_count * 8 / 1024.0) AS [Total Size (MB)],
        CONVERT(decimal(18,2), PhysicalStats.avg_fragmentation_in_percent) AS [Frag %],
        ParititionStats.row_count AS [Row Count],
        CONVERT(decimal(18,2), (PhysicalStats.page_count * 8.0 * 1024) / ParititionStats.row_count) AS [Index Size/Row (Bytes)]

FROM sys.dm_db_index_usage_stats UsageStats
    INNER JOIN sys.indexes Indexes ON Indexes.index_id = UsageStats.index_id AND Indexes.object_id = UsageStats.object_id
	INNER JOIN SYS.databases Databases ON Databases.database_id = UsageStats.database_id		
	INNER JOIN sys.dm_db_index_physical_stats (DB_ID(),NULL,NULL,NULL,NULL) AS PhysicalStats 
          ON PhysicalStats.index_id = UsageStats.Index_id and PhysicalStats.object_id = UsageStats.object_id
	INNER JOIN SYS.dm_db_partition_stats ParititionStats
          ON ParititionStats.index_id = UsageStats.index_id and ParititionStats.object_id = UsageStats.object_id		
WHERE UsageStats.user_scans = 0
	AND UsageStats.user_seeks = 0
	-- ignore indexes with less than a certain number of pages of memory
	AND PhysicalStats.page_count > @MinimumPageCount
	-- Exclude primary keys, which should not be removed
	AND Indexes.type_desc != 'CLUSTERED'		
ORDER BY [Page_Count] DESC


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