In this article, I will give information about how to query the missing Index in SQL Server.

Questions such as whether I have performance problems due to missing indexes in SQL Server may come to your mind.

At this point, we can query the missing indexes using the following queries.

Missing Index Query 1

SELECT TOP 10
       DB_NAME(id.database_id) AS databaseName,
       id.statement AS TableName,
       id.equality_columns,
       id.inequality_columns,
       id.included_columns,
       gs.last_user_seek,
       gs.user_seeks,
       gs.last_user_scan,
       gs.user_scans,
       gs.avg_total_user_cost * gs.avg_user_impact * (gs.user_seeks + gs.user_scans) AS ImprovementValue
FROM sys.dm_db_missing_index_group_stats gs
    INNER JOIN sys.dm_db_missing_index_groups ig
        ON gs.group_handle = ig.index_group_handle
    INNER JOIN sys.dm_db_missing_index_details id
        ON id.index_handle = ig.index_handle
ORDER BY avg_total_user_cost * avg_user_impact * (user_seeks + user_scans) DESC;

Missing Index Query 2

SELECT ig.*,
       statement AS table_name,
       column_id,
       column_name,
       column_usage
FROM sys.dm_db_missing_index_details AS id
    CROSS APPLY sys.dm_db_missing_index_columns(id.index_handle)
    INNER JOIN sys.dm_db_missing_index_groups AS ig
        ON id.index_handle = id.index_handle
ORDER BY ig.index_group_handle,
         ig.index_handle,
         column_id;

With these two queries, you can query the missing indexes and have these indexes created for performance improvement.

Good luck to everyone in business and life.

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