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This article will explain in detail how to query the use of Index in SQL sentences. The content of the article is of high quality, so the editor will share it with you for reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

SELECT sch.name +'.'+ t.name AS [Table Name], i.name AS [Index Name], i.type_desc, ISNULL (user_updates,0) AS [Total Writes], ISNULL (user_seeks+ user_scans + user_lookups,0) AS [Total Reads], s.last_user_seek, s.last_user_scan, s.last_user_lookup, ISNULL (user_updates,0)-ISNULL ((user_seeks+ user_scans + user_lookups)) 0) AS [Difference], p.reserved_page_count * 8.0 / 1024 as SpaceInMBFROM sys.indexes AS i WITH (NOLOCK) LEFT OUTERJOIN sys.dm_db_index_usage_statsAS s WITH (NOLOCK) ON s.object_id = i.object_id AND i.index_id = s.index_id AND s.database_id=db_id () AND objectproperty (s.object_id 'IsUserTable') = 1 INNER JOIN sys.tables AS t WITH (NOLOCK) ON i.object_id = t.object_id INNER JOIN sys.schemas AS sch WITH (NOLOCK) ON t.schema_id = sch.schema_id LEFT OUTERJOIN sys.dm_db_partition_stats AS p WITH (NOLOCK) ON i.index_id = p.index_id and i.object_id = p.object_idWHERE (1x 1)-AND ISNULL (user_updates) 0) > = ISNULL ((user_seeks + user_scans + user_lookups), 0)-- shows all indexesincluding those that have not been used-- AND ISNULL (user_updates,0)-ISNULL ((user_seeks + user_scans + user_lookups) 0) > 0-- only shows thoseindexes which have been used-- AND i.index_id > 1 muri-Only non-first indexes (I.E.non-primary key)-- AND i.is_primary_key1-- Only those that are not defined asa Primary Key)-- AND i.istically uniquetized int1 Murray-Only those that are not classed as "UniqueConstraints". ORDER BY [Table Name], [index name] about how to query Index usage in the SQL statement is shared here. I hope the above content can be helpful to you and learn more knowledge. If you think the article is good, you can share it for more people to see.

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