SQL语句实现查询并自动创建Missing Index

数据库  /  管理员 发布于 6年前   369

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