Just Learned - SQL Server - Get List of Ununsed Index using SYS.DM_DB_INDEX_USAGE_STATS

Getting Started with Adobe After Effects - Part 6: Motion Blur


	Just Learned

A collection of quick technology learning tips from what people around you learn every day


	Submit a tip


	Subscribe..

Home · Most Liked · Most Learned · Most Discussed · Silver Rated · Sections

SQL Server - Get List of Ununsed Index using SYS.DM_DB_INDEX_USAGE_STATS

Oct 12 2011 6:46AM by Nirav

DMV "SYS.DMDBINDEXUSAGESTATS" provides index usage stats. By using this we can find the unused indexes. Below script will gives you unused indexes

USE YourDatabseName
GO
DECLARE @dbid INT
SELECT @dbid = DB_ID(DB_NAME())
SELECT OBJECTNAME = OBJECT_NAME(I.OBJECT_ID),
INDEXNAME = I.NAME,
I.INDEX_ID
FROM SYS.INDEXES I
JOIN SYS.OBJECTS O
ON I.OBJECT_ID = O.OBJECT_ID
WHERE OBJECTPROPERTY(O.OBJECT_ID,'IsUserTable') = 1
AND I.INDEX_ID NOT IN (
SELECT S.INDEX_ID
FROM SYS.DM_DB_INDEX_USAGE_STATS S
WHERE S.OBJECT_ID = I.OBJECT_ID
AND I.INDEX_ID = S.INDEX_ID
AND DATABASE_ID = @dbid)
ORDER BY OBJECTNAME,
I.INDEX_ID,
INDEXNAME ASC
GO

Read More.. [0 clicks]

Published under: SQL Server Tips · · · ·

Previous: SQL Server - Sparse Columns avoid storage for NULL values
Next: Adding the transactional publication in Replication - SQL Server

Nirav

37 · 5% · 1593

Liked

Knew

Learned

Incorrect

Interesting

Forgotten


Post this to my facebook wall
Tweet this
Like This
I knew this before
Thanks, I just learned it from you
Sorry, but this is not correct
Interesting, but not my area
I knew it but i have forgotten it


	Submit

1 Comments

I had to adapt the script, as my servers are using a 'case sensitive' collation :

DECLARE @dbid INT;
SELECT @dbid = DB_ID(DB_NAME())
SELECT  OBJECTNAME = OBJECT_NAME(I.object_id),
    	INDEXNAME = I.NAME,
    	I.INDEX_ID
FROM sys.indexes I
JOIN sys.objects O ON (I.object_id = O.object_id)
WHERE OBJECTPROPERTY(O.object_id,'IsUserTable') = 1
  AND I.index_id NOT IN (
    SELECT S.index_id
    FROM sys.dm_db_index_usage_stats S
    WHERE S.object_id = I.object_id
    AND I.index_id = S.index_id
    AND database_id = @dbid)
ORDER BY OBJECTNAME,I.index_id,INDEXNAME ASC
GO

commented on Oct 13 2011 2:03AM

Bert

57 · 3% · 1038

Your Comment

Sign Up or Login to post a comment.

"SQL Server - Get List of Ununsed Index using SYS.DM_DB_INDEX_USAGE_STATS " rated 5 out of 5 by 4 readers