SQL语句实现查询并自动创建Missing Index

原作者: [db:作者] 来自: [db:来源] 收藏邀请

SELECT
 
 migs.avg_total_user_cost*(migs.avg_user_impact/ 100.0) *(migs.user_seeks + migs.user_scans) ASimprovement_measure,
 
 'CREATE INDEX[missing_index_' + CONVERT(varchar, mig.index_group_handle) + '_' + CONVERT(varchar, mid.index_handle)
 
 + '_' + LEFT(PARSENAME(mid.statement, 1), 32) + ']'
 
 + ' ON ' + mid.statement
 
 + ' (' + ISNULL(mid.equality_columns,'')
 
  + CASE WHEN mid.equality_columns IS NOT NULL AND mid.inequality_columnsIS NOT NULL THEN ',' ELSE '' END
 
  + ISNULL(mid.inequality_columns, '')
 
 + ')'
 
 + ISNULL(' INCLUDE (' + mid.included_columns+ ')', '') AScreate_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_statsmigs ON migs.group_handle= mig.index_group_handle
 
INNER JOIN sys.dm_db_missing_index_detailsmid ON mig.index_handle= mid.index_handle
 
WHERE migs.avg_total_user_cost *(migs.avg_user_impact /100.0) *(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