查看索引使用情况

索引使用情况信息，存放在sys.dm_db_index_usage_stats 中

--查看索引使用情况

SELECT o.name Object_Name, SCHEMA_NAME(o.schema_id) Schema_name,
i.name Index_name, i.Type_Desc,
s.user_seeks, s.user_scans,
s.user_lookups, s.user_updates
FROM sys.objects AS o
JOIN sys.indexes AS i ON o.object_id = i.object_id
JOIN sys.dm_db_index_usage_stats AS s ON i.object_id = s.object_id
AND i.index_id = s.index_id
WHERE o.type = 'u'
-- Clustered and Non-Clustered indexes
AND i.type IN (1, 2)
-- Indexes that have been updated by not used
AND(s.user_seeks > 0 or s.user_scans > 0 or s.user_lookups > 0 )
order by o.name