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我需要弄清楚在 MS Sql Server FileTable 上插入了多少文件以及它们的平均大小。

FileTable 已经相当大了，它可以容纳大约 27GB 的数据。

这是我正在使用的 SQL，但它非常慢。它已经运行了一个多小时，仍然没有完成。有什么办法可以加快查询速度？

SELECT round(datalength([file_stream]) / 1048576.0, 2) As FileSizeMB, COUNT(*)
FROM [dbo].[Document] WITH(NOLOCK)
GROUP BY round(datalength([file_stream]) / 1048576.0, 2)
ORDER BY round(datalength([file_stream]) / 1048576.0, 2)
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1 回答 1

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不确定这是否可行，我没有实现 FileTable，但这会获得表的大小。

SELECT  
s.Name AS SchemaName,
        t.NAME AS TableName,
        p.rows AS RowCounts,
        SUM(a.total_pages) * 8 AS TotalSpaceKB,
        ( SUM(a.total_pages) * 8 ) / 1024.0 AS TotalSpaceMB,
        (( SUM(a.total_pages) * 8 ) / 1024.0)/1024.0 AS TotalSpaceGB,
        SUM(a.used_pages) * 8 AS UsedSpaceKB,
        ( SUM(a.used_pages) * 8 ) / 1024.0 AS UsedSpaceMB,
        (( SUM(a.used_pages) * 8 ) / 1024.0) /1024.0 AS UsedSpaceGB,
        ( SUM(a.total_pages) - SUM(a.used_pages) ) * 8 AS UnusedSpaceKB,
        ( ( SUM(a.total_pages) - SUM(a.used_pages) ) * 8 ) / 1024.0 AS UnusedSpaceMB,
        (( ( SUM(a.total_pages) - SUM(a.used_pages) ) * 8 ) / 1024.0)/1024.0 AS UnusedSpaceGB,
       GROUPING(t.Name)
FROM    sys.tables t
        INNER JOIN sys.schemas s ON s.schema_id = t.schema_id
        INNER JOIN sys.indexes i ON t.OBJECT_ID = i.object_id
        INNER JOIN sys.partitions p ON i.object_id = p.OBJECT_ID
                                       AND i.index_id = p.index_id
        INNER JOIN sys.allocation_units a ON p.partition_id = a.container_id
WHERE   t.NAME NOT LIKE 'dt%'
        AND t.is_ms_shipped = 0
        AND i.OBJECT_ID > 255
GROUP BY s.Name,
         t.Name,
        p.Rows
       WITH ROLLUP
       ORDER BY s.Name,
        t.Name
于 2014-12-05T18:07:13.913 回答