--It runs at DB Instance Level.
SELECT
CONVERT (varchar(30), getdate(), 126) AS runtime, mig.index_group_handle, mid.index_handle,
CONVERT (decimal (28, 1), migs.avg_total_user_cost * migs.avg_user_impact * (migs.user_seeks + migs.user_scans) ) AS improvement_measure,
'CREATE INDEX missing_index_' + CONVERT (varchar, mig.index_group_handle) + '_' + CONVERT (varchar, mid.index_handle) + ' ON ' + mid.statement + ' (' + ISNULL (mid.equality_columns, '') + CASE
WHEN mid.equality_columns IS NOT NULL
AND mid.inequality_columns IS NOT NULL THEN ','
ELSE ''
END + ISNULL (mid.inequality_columns, '') + ')' + ISNULL (' INCLUDE (' + mid.included_columns + ')', '') AS create_index_statement,
migs.*, mid.database_id, mid.[object_id]
FROM sys.dm_db_missing_index_groups mig
INNER JOIN sys.dm_db_missing_index_group_stats migs ON migs.group_handle = mig.index_group_handle
INNER JOIN sys.dm_db_missing_index_details mid ON mig.index_handle = mid.index_handle
WHERE CONVERT (decimal (28, 1),migs.avg_total_user_cost * migs.avg_user_impact * (migs.user_seeks + migs.user_scans)) > 10
ORDER BY migs.avg_total_user_cost * migs.avg_user_impact * (migs.user_seeks + migs.user_scans) DESC
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