--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%'
转播
