我要感谢Greg Low先生的提问：

SELECT o.name AS ObjectName, 
       SUM(reserved_page_count) * 8.0 / 1024 AS SizeinMB
FROM sys.dm_db_partition_stats AS ps
INNER JOIN sys.sysobjects AS o
ON ps.object_id = o.id
GROUP BY o.name
ORDER BY SizeinMB DESC;

我的文章只与SQL Server 2000相关，并且已经过测试，可以在我的环境中工作。

该代码访问单个实例的所有可能的数据库，而不仅仅是单个数据库。

我使用两个临时表来帮助收集适当的数据，然后将结果转储到一个“Live”表中。

返回的数据是：DatabaseName、DatabaseTableName、Rows（在表中）、data（表的大小，以KB为单位）、entry data（我发现这对了解我上次运行脚本的时间很有用）。

这段代码的缺点是“data”字段不是以int形式存储的（字符“KB”保留在该字段中），这对于排序是有用的（但不是完全必要的）。

希望这段代码能帮助一些人，并为他们节省一些时间！

CREATE PROCEDURE [dbo].[usp_getAllDBTableSizes]

AS
BEGIN
   SET NOCOUNT OFF

   CREATE TABLE #DatabaseTables([dbname] sysname,TableName sysname)
   CREATE TABLE #AllDatabaseTableSizes(Name sysname,[rows] VARCHAR(18), reserved VARCHAR(18), data VARCHAR(18), index_size VARCHAR(18), unused VARCHAR(18))

   DECLARE @SQL nvarchar(4000)
   SET @SQL='select ''?'' AS [Database], Table_Name from [?].information_schema.tables WHERE TABLE_TYPE = ''BASE TABLE'' '

   INSERT INTO #DatabaseTables(DbName, TableName)
      EXECUTE sp_msforeachdb @Command1=@SQL

   DECLARE AllDatabaseTables CURSOR LOCAL READ_ONLY FOR   
   SELECT TableName FROM #DatabaseTables

   DECLARE AllDatabaseNames CURSOR LOCAL READ_ONLY FOR   
   SELECT DBName FROM #DatabaseTables

   DECLARE @DBName sysname  
   OPEN AllDatabaseNames  

   DECLARE @TName sysname
   OPEN AllDatabaseTables  

   WHILE 1=1 BEGIN 
      FETCH NEXT FROM AllDatabaseNames INTO @DBName  
      FETCH NEXT FROM AllDatabaseTables INTO @TName 
      IF @@FETCH_STATUS<>0 BREAK  
      INSERT INTO #AllDatabaseTableSizes
         EXEC ( 'EXEC ' + @DBName + '.dbo.sp_spaceused ' + @TName) 

   END 

   --http://msdn.microsoft.com/en-us/library/aa175920(v=sql.80).aspx
   INSERT INTO rsp_DatabaseTableSizes (DatabaseName, name, [rows], data)
      SELECT   [dbname], name, [rows],  data FROM #DatabaseTables
      INNER JOIN #AllDatabaseTableSizes
      ON #DatabaseTables.TableName = #AllDatabaseTableSizes.Name
      GROUP BY [dbname] , name, [rows],  data
      ORDER BY [dbname]
   --To be honest, I have no idea what exact duplicates we are dropping
    -- but in my case a near enough approach has been good enough.
   DELETE FROM [rsp_DatabaseTableSizes]
   WHERE name IN 
      ( 
      SELECT name 
      FROM [rsp_DatabaseTableSizes]
      GROUP BY name
      HAVING COUNT(*) > 1
      )

   DROP TABLE #DatabaseTables
   DROP TABLE #AllDatabaseTableSizes

   CLOSE AllDatabaseTables  
   DEALLOCATE AllDatabaseTables  

   CLOSE AllDatabaseNames  
   DEALLOCATE AllDatabaseNames      
END

--EXEC [dbo].[usp_getAllDBTableSizes] 

如果您需要知道，rsp_DatabaseTableSizes表是通过以下方式创建的：

CREATE TABLE [dbo].[rsp_DatabaseSizes](
    [DatabaseName] [varchar](1000) NULL,
    [dbSize] [decimal](15, 2) NULL,
    [DateUpdated] [smalldatetime] NULL
) ON [PRIMARY]

GO

我们使用表分区，由于重复记录，上面提供的查询有一些问题。

对于需要此功能的人，您可以在下面找到SQL Server 2014在生成“磁盘使用情况（按表）”报告时运行的查询。我假设它也适用于以前版本的SQL Server。

它就像一个符咒。

SELECT
    a2.name AS [tablename],
    a1.rows as row_count,
    (a1.reserved + ISNULL(a4.reserved,0))* 8 AS reserved, 
    a1.data * 8 AS data,
    (CASE WHEN (a1.used + ISNULL(a4.used,0)) > a1.data THEN (a1.used + ISNULL(a4.used,0)) - a1.data ELSE 0 END) * 8 AS index_size,
    (CASE WHEN (a1.reserved + ISNULL(a4.reserved,0)) > a1.used THEN (a1.reserved + ISNULL(a4.reserved,0)) - a1.used ELSE 0 END) * 8 AS unused
FROM
    (SELECT 
        ps.object_id,
        SUM (
            CASE
                WHEN (ps.index_id < 2) THEN row_count
                ELSE 0
            END
            ) AS [rows],
        SUM (ps.reserved_page_count) AS reserved,
        SUM (
            CASE
                WHEN (ps.index_id < 2) THEN (ps.in_row_data_page_count + ps.lob_used_page_count + ps.row_overflow_used_page_count)
                ELSE (ps.lob_used_page_count + ps.row_overflow_used_page_count)
            END
            ) AS data,
        SUM (ps.used_page_count) AS used
    FROM sys.dm_db_partition_stats ps
        WHERE ps.object_id NOT IN (SELECT object_id FROM sys.tables WHERE is_memory_optimized = 1)
    GROUP BY ps.object_id) AS a1
LEFT OUTER JOIN 
    (SELECT 
        it.parent_id,
        SUM(ps.reserved_page_count) AS reserved,
        SUM(ps.used_page_count) AS used
     FROM sys.dm_db_partition_stats ps
     INNER JOIN sys.internal_tables it ON (it.object_id = ps.object_id)
     WHERE it.internal_type IN (202,204)
     GROUP BY it.parent_id) AS a4 ON (a4.parent_id = a1.object_id)
INNER JOIN sys.all_objects a2  ON ( a1.object_id = a2.object_id ) 
INNER JOIN sys.schemas a3 ON (a2.schema_id = a3.schema_id)
WHERE a2.type <> N'S' and a2.type <> N'IT'
ORDER BY a3.name, a2.name

如果您只关心数据库中的空浪费空间，而不关心单个表，则可以考虑以下问题：

如果数据库经历了大量的数据插入和删除，可能与ETL情况类似，这将导致数据库中有太多未使用的空间，因为文件组会自动增长，但不会自动收缩。

您可以通过使用数据库的财产页面来查看是否是这种情况。您可以收缩（右键单击数据库>任务>收缩）并收回一些空间。但是，如果根本原因仍然存在，则数据库将增长（并花费额外的时间尝试增长，直到增长到足够的速度，所以不要这样做）

如果您使用的是SQL Server Management Studio（SSMS），则可以运行标准报告，而不是运行查询（在我的情况下返回重复的行）

右键单击数据库导航到报告>标准报告>磁盘使用情况（按表）

注意：数据库兼容级别必须设置为90或更高，才能正常工作。看见http://msdn.microsoft.com/en-gb/library/bb510680.aspx

扩展到@xav答案，处理表分区以获得MB和GB大小。在SQL Server 2008/2012上测试（注释了一行，其中is_memory_optized=1）

SELECT
    a2.name AS TableName,
    a1.rows as [RowCount],
    --(a1.reserved + ISNULL(a4.reserved,0)) * 8 AS ReservedSize_KB,
    --a1.data * 8 AS DataSize_KB,
    --(CASE WHEN (a1.used + ISNULL(a4.used,0)) > a1.data THEN (a1.used + ISNULL(a4.used,0)) - a1.data ELSE 0 END) * 8 AS IndexSize_KB,
    --(CASE WHEN (a1.reserved + ISNULL(a4.reserved,0)) > a1.used THEN (a1.reserved + ISNULL(a4.reserved,0)) - a1.used ELSE 0 END) * 8 AS UnusedSize_KB,
    CAST(ROUND(((a1.reserved + ISNULL(a4.reserved,0)) * 8) / 1024.00, 2) AS NUMERIC(36, 2)) AS ReservedSize_MB,
    CAST(ROUND(a1.data * 8 / 1024.00, 2) AS NUMERIC(36, 2)) AS DataSize_MB,
    CAST(ROUND((CASE WHEN (a1.used + ISNULL(a4.used,0)) > a1.data THEN (a1.used + ISNULL(a4.used,0)) - a1.data ELSE 0 END) * 8 / 1024.00, 2) AS NUMERIC(36, 2)) AS IndexSize_MB,
    CAST(ROUND((CASE WHEN (a1.reserved + ISNULL(a4.reserved,0)) > a1.used THEN (a1.reserved + ISNULL(a4.reserved,0)) - a1.used ELSE 0 END) * 8 / 1024.00, 2) AS NUMERIC(36, 2)) AS UnusedSize_MB,
    --'| |' Separator_MB_GB,
    CAST(ROUND(((a1.reserved + ISNULL(a4.reserved,0)) * 8) / 1024.00 / 1024.00, 2) AS NUMERIC(36, 2)) AS ReservedSize_GB,
    CAST(ROUND(a1.data * 8 / 1024.00 / 1024.00, 2) AS NUMERIC(36, 2)) AS DataSize_GB,
    CAST(ROUND((CASE WHEN (a1.used + ISNULL(a4.used,0)) > a1.data THEN (a1.used + ISNULL(a4.used,0)) - a1.data ELSE 0 END) * 8 / 1024.00 / 1024.00, 2) AS NUMERIC(36, 2)) AS IndexSize_GB,
    CAST(ROUND((CASE WHEN (a1.reserved + ISNULL(a4.reserved,0)) > a1.used THEN (a1.reserved + ISNULL(a4.reserved,0)) - a1.used ELSE 0 END) * 8 / 1024.00 / 1024.00, 2) AS NUMERIC(36, 2)) AS UnusedSize_GB
FROM
    (SELECT 
        ps.object_id,
        SUM (CASE WHEN (ps.index_id < 2) THEN row_count ELSE 0 END) AS [rows],
        SUM (ps.reserved_page_count) AS reserved,
        SUM (CASE
                WHEN (ps.index_id < 2) THEN (ps.in_row_data_page_count + ps.lob_used_page_count + ps.row_overflow_used_page_count)
                ELSE (ps.lob_used_page_count + ps.row_overflow_used_page_count)
            END
            ) AS data,
        SUM (ps.used_page_count) AS used
    FROM sys.dm_db_partition_stats ps
        --===Remove the following comment for SQL Server 2014+
        --WHERE ps.object_id NOT IN (SELECT object_id FROM sys.tables WHERE is_memory_optimized = 1)
    GROUP BY ps.object_id) AS a1
LEFT OUTER JOIN 
    (SELECT 
        it.parent_id,
        SUM(ps.reserved_page_count) AS reserved,
        SUM(ps.used_page_count) AS used
     FROM sys.dm_db_partition_stats ps
     INNER JOIN sys.internal_tables it ON (it.object_id = ps.object_id)
     WHERE it.internal_type IN (202,204)
     GROUP BY it.parent_id) AS a4 ON (a4.parent_id = a1.object_id)
INNER JOIN sys.all_objects a2  ON ( a1.object_id = a2.object_id ) 
INNER JOIN sys.schemas a3 ON (a2.schema_id = a3.schema_id)
WHERE a2.type <> N'S' and a2.type <> N'IT'
--AND a2.name = 'MyTable'       --Filter for specific table
--ORDER BY a3.name, a2.name
ORDER BY ReservedSize_MB DESC