查询并自动创建Missing Index

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 NULLAND mid.inequality_columnsISNOT 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_statsmigsON migs.group_handle= mig.index_group_handle

 

INNER JOIN sys.dm_db_missing_index_detailsmidON 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