‫تشخیص کمبود ایندکس‌ها در SQL server

USE master; 
SELECT d.database_id,
      d.object_id,
      d.index_handle,
      d.equality_columns,
      d.inequality_columns,
      d.included_columns,
      d.statement AS fully_qualified_object,
      gs.*
FROM   sys.dm_db_missing_index_groups g
JOIN   sys.dm_db_missing_index_group_stats gs
 ON   gs.group_handle = g.index_group_handle
JOIN   sys.dm_db_missing_index_details d
 ON   g.index_handle = d.index_handle

CREATE NONCLUSTERED INDEX <unique index name>
ON <FULL_TABLE_NAME> (<EQUALITY_COLUMNS>,<INEQUALITY_COLUMNS>) -- exclude INEQUALITY_COLUMNS if NULL
INCLUDE (<INCLUDED_COLUMNS>); -- exclude INCLUDED_COLUMNS if NULL

SELECT mig.index_group_handle,
      mid.index_handle,
      migs.avg_total_user_cost AS AvgTotalUserCostThatCouldbeReduced,
      migs.avg_user_impact AS AvgPercentageBenefit,
      '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

   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