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  • 几个精彩的DMV

    --统计表的增删改次数,反映表的使用程度  

    SELECT DB_NAME([database_id]) AS [Database]
    ,iops.[object_id] AS [ObjectID]
    ,QUOTENAME(OBJECT_SCHEMA_NAME(iops.[object_id], [database_id])) + N'.' + QUOTENAME(OBJECT_NAME(iops.[object_id], [database_id])) AS [ObjectName]
    ,i.[index_id] AS [IndexID]
    ,i.[name] AS [IndexName]
    ,i.[fill_factor] AS [IndexFillFactor]
    ,iops.[partition_number] AS [PartitionNumber]
    ,CASE
    WHEN i.[is_unique] = 1
    THEN 'UNIQUE '
    ELSE ''
    END + i.[type_desc] AS [IndexType]
    ,iops.[leaf_insert_count] AS [LeafInsertCount]
    ,iops.[leaf_delete_count] AS [LeafDeleteCount]
    ,iops.[leaf_update_count] AS [LeafUpdateCount]
    FROM [sys].[dm_db_index_operational_stats](null, NULL, NULL, NULL) iops
    INNER JOIN [sys].[indexes] i
    ON i.[object_id] = iops.[object_id]
    AND i.[index_id] = iops.[index_id]
    WHERE OBJECTPROPERTY(iops.[OBJECT_ID],'IsUserTable') = 1
    ORDER BY iops.[page_latch_wait_count] + iops.[page_io_latch_wait_count] DESC

    --SP最后一次执行时间
    SELECT o.name,
    ps.last_execution_time
    FROM sys.dm_exec_procedure_stats ps
    INNER JOIN
    sys.objects o
    ON ps.object_id = o.object_id
    WHERE DB_NAME(ps.database_id) = 'Your DBname'
    ORDER BY
    ps.last_execution_time DESC

    --varchar 复制到 nvarchar乱码了,查询时通过如下进行转码

    select cast (cast (remarks as varbinary(1000)) as varchar(2000)) as remarks
    from t1 with (nolock)
    where id =22685940

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  • 原文地址:https://www.cnblogs.com/justdba/p/5610652.html
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