查看索引使用情况
select s.Name + N'.' + t.name as [Table] ,i.name as [Index] ,i.is_unique as [IsUnique] ,ius.user_seeks as [Seeks], ius.user_scans as [Scans] ,ius.user_lookups as [Lookups] ,ius.user_seeks + ius.user_scans + ius.user_lookups as [Reads] ,ius.user_updates as [Updates], ius.last_user_seek as [Last Seek] ,ius.last_user_scan as [Last Scan], ius.last_user_lookup as [Last Lookup] ,ius.last_user_update as [Last Update] from sys.tables t with (nolock) join sys.indexes i with (nolock) on t.object_id = i.object_id join sys.schemas s with (nolock) on t.schema_id = s.schema_id left outer join sys.dm_db_index_usage_stats ius on ius.database_id = db_id() and ius.object_id = i.object_id and ius.index_id = i.index_id order by s.name, t.name, i.index_id option (recompile)
