SQL Server SQL语句查询Index使用状况示例
2022-11-12 09:40:52
内容摘要
这篇文章主要为大家详细介绍了SQL Server SQL语句查询Index使用状况示例,具有一定的参考价值,可以用来参考一下。
对此感兴趣的朋友,看看idc笔记做的技术笔记!
代码如下:
SELE
文章正文
这篇文章主要为大家详细介绍了SQL Server SQL语句查询Index使用状况示例,具有一定的参考价值,可以用来参考一下。
对此感兴趣的朋友,看看idc笔记做的技术笔记!
代码如下:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | <code> SELECT sch.name + '.' + t.name AS [Table Name], i.name AS[Index Name], i.type_desc, ISNULL(user_updates,0) AS [Total Writes], ISNULL(user_seeks +user_scans + user_lookups,0) AS [Total Reads], s.last_user_seek, s.last_user_scan , s.last_user_lookup, ISNULL(user_updates,0) - ISNULL((user_seeks+ user_scans +user_lookups),0)AS [Difference], p.reserved_page_count * 8.0 / 1024 as SpaceInMB FROM sys.indexes AS i WITH (NOLOCK) LEFT OUTERJOIN sys.dm_db_index_usage_statsAS s WITH (NOLOCK) ON s.object_id = i.object_id AND i.index_id = s.index_id AND s.database_id=db_id() AND objectproperty(s.object_id, 'IsUserTable' ) = 1 INNER JOIN sys.tables AS t WITH (NOLOCK) ON i.object_id = t.object_id INNER JOIN sys.schemas AS sch WITH (NOLOCK) ON t.schema_id = sch.schema_id LEFT OUTERJOIN sys.dm_db_partition_stats AS p WITH (NOLOCK) ON i.index_id = p.index_id and i.object_id = p.object_id WHERE (1=1) --AND ISNULL(user_updates,0) >=ISNULL((user_seeks + user_scans + user_lookups),0) --shows all indexesincluding those that have not been used --AND ISNULL(user_updates,0) -ISNULL((user_seeks + user_scans + user_lookups),0)>0 --only shows thoseindexes which have been used --AND i.index_id > 1 -- Only non-first indexes (I.E.non-primary key) --AND i.is_primary_key<>1 -- Only those that are not defined asa Primary Key) --AND i.is_unique_constraint<>1-- Only those that are not classed as "UniqueConstraints" . ORDER BY [Table Name],[index name]</code> |
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代码注释