SqlServer中查看索引的使用情况

--查看数据库索引的使用情况
select db_name(database_id) as N'TOPK_TO_DEV',  --库名
        object_name(a.object_id) as N'TopProjectNew',  --表明
        b.name N'索引名称',
        user_seeks N'用户索引查找次数',
        user_scans N'用户索引扫描次数',
        last_user_seek N'最后查找时间',
       last_user_scan N'最后扫描时间',
        rows as N'表中的行数'
from sys.dm_db_index_usage_stats a join
      sys.indexes b
      on a.index_id = b.index_id
     and a.object_id = b.object_id
     join sysindexes c
      on c.id = b.object_id
where database_id=db_id('TOPK_TO_DEV')   ---改成要查看的数据库
 and object_name(a.object_id) not like 'sys%'
 order by user_seeks,user_scans,object_name(a.object_id)

清空查询缓存：

  --清空查询缓存
  DBCC freeproccache

 -- 查看sql执行计划
 SELECT  *
  FROM   TopProjectNew  --表名

 SELECT  cacheobjtype ,
         objtype ,
        usecounts ,
         sql
 FROM    sys.syscacheobjects
 WHERE   sql NOT LIKE '%cach%'
         AND sql NOT LIKE '"sys."'
        AND cacheobjtype LIKE '%Plan%'