查看数据库表索引的使用情况

查看数据库表索引的使用情况

--查看数据库表索引的使用情况
SELECT  DB_NAME(database_id) AS N\'数据库名\' ,  --库名
        OBJECT_NAME(a.object_id) AS N\'表名\' ,
        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(\'JRE\')   ---改成要查看的数据库
        AND OBJECT_NAME(a.object_id) = \'T_Invoice\'--改成要查看的表名
ORDER BY user_seeks ,
        user_scans ,
        OBJECT_NAME(a.object_id);

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 查看指定表 Student 中的索引

EXEC sp_helpindex T_FPSJLR;

---

--创建非聚集索引
CREATE NONCLUSTERED INDEX IX_T_Attachment_Null3
ON T_Attachment(Null3)
WITH (DROP_EXISTING=OFF);

CREATE NONCLUSTERED INDEX idx_T_FPSJLR_FPHM_FPJE
ON [dbo].[T_FPSJLR] ([FPHM])
INCLUDE ([FPJE])
--删除索引
DROP INDEX IX_T_Attachment_Null3
ON T_Attachment;