May 17, 2026, 11:40 PM

2026-05-18 06:40:19 +00:00
commit 64944cf004
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+---------------------------------------------------------------------------------------------------------------------------
+-- Purpose: This query will return information about indexes and index usage.  Run this in the user database.
+-- More Information: https://www.mssqltips.com/sqlservertip/1545/deeper-insight-into-used-and-unused-indexes-for-sql-server/
+-- Revision: 2019-05-21
+--
+SELECT PVT.SCHEMANAME, PVT.TABLENAME, PVT.INDEXNAME, PVT.INDEX_ID, [1] AS COL1, [2] AS COL2, [3] AS COL3, [4] AS COL4,  [5] AS COL5, [6] AS COL6, [7] AS COL7, B.USER_SEEKS, B.USER_SCANS, B.USER_LOOKUPS, B.USER_UPDATES 
+FROM   (SELECT SCHEMA_NAME(A.SCHEMA_id) AS SCHEMANAME,
+               A.NAME AS TABLENAME, 
+               A.OBJECT_ID, 
+               B.NAME AS INDEXNAME, 
+               B.INDEX_ID, 
+               D.NAME AS COLUMNNAME, 
+               C.KEY_ORDINAL 
+        FROM   SYS.OBJECTS A 
+               INNER JOIN SYS.INDEXES B ON A.OBJECT_ID = B.OBJECT_ID 
+               LEFT JOIN SYS.INDEX_COLUMNS C ON B.OBJECT_ID = C.OBJECT_ID AND B.INDEX_ID = C.INDEX_ID 
+               LEFT JOIN SYS.COLUMNS D ON C.OBJECT_ID = D.OBJECT_ID AND C.COLUMN_ID = D.COLUMN_ID 
+        WHERE  A.TYPE = 'U') P 
+       PIVOT 
+       (MIN(COLUMNNAME) 
+        FOR KEY_ORDINAL IN ( [1],[2],[3],[4],[5],[6],[7] ) ) AS PVT 
+INNER JOIN SYS.DM_DB_INDEX_USAGE_STATS B ON PVT.OBJECT_ID = B.OBJECT_ID AND PVT.INDEX_ID = B.INDEX_ID AND B.DATABASE_ID = DB_ID() 
+UNION -- below returns indexes not used with usage information
+SELECT SCHEMANAME, TABLENAME, INDEXNAME, INDEX_ID, [1] AS COL1, [2] AS COL2, [3] AS COL3, [4] AS COL4, [5] AS COL5, [6] AS COL6, [7] AS COL7, 0, 0, 0, 0 
+FROM   (SELECT SCHEMA_NAME(A.SCHEMA_id) AS SCHEMANAME,
+               A.NAME AS TABLENAME, 
+               A.OBJECT_ID, 
+               B.NAME AS INDEXNAME, 
+               B.INDEX_ID, 
+               D.NAME AS COLUMNNAME, 
+               C.KEY_ORDINAL 
+        FROM   SYS.OBJECTS A 
+               INNER JOIN SYS.INDEXES B ON A.OBJECT_ID = B.OBJECT_ID 
+			   LEFT JOIN SYS.INDEX_COLUMNS C ON B.OBJECT_ID = C.OBJECT_ID AND B.INDEX_ID = C.INDEX_ID 
+               LEFT JOIN SYS.COLUMNS D ON C.OBJECT_ID = D.OBJECT_ID AND C.COLUMN_ID = D.COLUMN_ID 
+        WHERE  A.TYPE = 'U') P 
+       PIVOT 
+       (MIN(COLUMNNAME) 
+        FOR KEY_ORDINAL IN ( [1],[2],[3],[4],[5],[6],[7] ) ) AS PVT 
+WHERE  NOT EXISTS (SELECT OBJECT_ID, 
+                          INDEX_ID 
+                   FROM   SYS.DM_DB_INDEX_USAGE_STATS B 
+                   WHERE  DATABASE_ID = DB_ID(DB_NAME()) 
+                          AND PVT.OBJECT_ID = B.OBJECT_ID 
+                          AND PVT.INDEX_ID = B.INDEX_ID) 
+ORDER BY SCHEMANAME, TABLENAME, INDEX_ID;