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轻松学会：如何使用CMD命令查看数据库表空间大小与使用情况

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在数据库管理中，了解表空间的大小和使用情况对于优化数据库性能至关重要。对于Windows操作系统上的数据库，如SQL Server，我们可以通过CMD命令行工具来查看这些信息。下面，我将详细讲解如何使用CMD命令来查看数据库的表空间大小与使用情况。

步骤一：打开CMD命令行窗口

  1. 搜索CMD：在Windows搜索栏中输入“cmd”，然后点击“命令提示符”或“cmd.exe”打开命令行窗口。
  2. 以管理员身份运行：右键点击“命令提示符”，选择“以管理员身份运行”，以确保有足够的权限执行某些操作。

步骤二：连接到数据库

在CMD窗口中，你需要连接到你的数据库。以下是如何连接到SQL Server数据库的示例：

REM 连接到本地实例的SQL Server数据库
sqlcmd -S .\YOURINSTANCE -U YOURUSERNAME -P YOURPASSWORD

将YOURINSTANCE替换为你的SQL Server实例名称，YOURUSERNAME和YOURPASSWORD替换为你的数据库用户名和密码。

步骤三：查询表空间大小与使用情况

一旦连接到数据库，你可以使用以下SQL查询来获取表空间的大小和使用情况：

REM 查询所有表空间的大小和使用情况
SELECT 
    DB_NAME(database_id) AS DatabaseName,
    name AS TableName,
    SUM(size/128.0) AS TotalSpaceInMB
FROM 
    sys.master_files
WHERE 
    type_desc = 'ROWS'
GROUP BY 
    database_id, name
ORDER BY 
    TotalSpaceInMB DESC;

这个查询将列出数据库中所有表的大小，以及它们占用的总空间。sys.master_files系统视图提供了关于数据库中所有文件的信息，其中type_desc = 'ROWS'指定了我们只关心数据文件。

注意：

  • SUM(size/128.0)将文件大小转换为MB。
  • 你可能需要根据你的数据库调整查询。

步骤四：理解输出结果

执行上述查询后，你会得到一个表格，其中包含数据库的名称、表的名称和每个表使用的空间大小。以下是输出结果的一个示例：

”` DatabaseName TableName TotalSpaceInMB

AdventureWorks2012 Person.Address 8192.00 AdventureWorks2012 Person.BusinessEntityAddress 8192.00 AdventureWorks2012 Person.Person 8192.00 AdventureWorks2012 Person.PhoneNumber 8192.00 AdventureWorks2012 Person.StateProvince 8192.00 AdventureWorks2012 Sales.Customer 8192.00 AdventureWorks2012 Sales.SalesOrderHeader 8192.00 AdventureWorks2012 Sales.SalesOrderDetail 8192.00 AdventureWorks2012 Sales.SalesTerritory 8192.00 AdventureWorks2012 Sales.SalesOrderHeader 16384.00 AdventureWorks2012 Sales.SalesTerritory 16384.00 AdventureWorks2012 Sales.SalesOrderDetail 16384.00 AdventureWorks2012 Sales.SalesOrderHeader 32768.00 AdventureWorks2012 Sales.SalesTerritory 32768.00 AdventureWorks2012 Sales.SalesOrderDetail 32768.00 AdventureWorks2012 Sales.SalesOrderHeader 40960.00 AdventureWorks2012 Sales.SalesTerritory 40960.00 AdventureWorks2012 Sales.SalesOrderDetail 40960.00 AdventureWorks2012 Sales.SalesOrderHeader 49152.00 AdventureWorks2012 Sales.SalesTerritory 49152.00 AdventureWorks2012 Sales.SalesOrderDetail 49152.00 AdventureWorks2012 Sales.SalesOrderHeader 58816.00 AdventureWorks2012 Sales.SalesTerritory 58816.00 AdventureWorks2012 Sales.SalesOrderDetail 58816.00 AdventureWorks2012 Sales.SalesOrderHeader 68432.00 AdventureWorks2012 Sales.SalesTerritory 68432.00 AdventureWorks2012 Sales.SalesOrderDetail 68432.00 AdventureWorks2012 Sales.SalesOrderHeader 78016.00 AdventureWorks2012 Sales.SalesTerritory 78016.00 AdventureWorks2012 Sales.SalesOrderDetail 78016.00 AdventureWorks2012 Sales.SalesOrderHeader 87632.00 AdventureWorks2012 Sales.SalesTerritory 87632.00 AdventureWorks2012 Sales.SalesOrderDetail 87632.00 AdventureWorks2012 Sales.SalesOrderHeader 97216.00 AdventureWorks2012 Sales.SalesTerritory 97216.00 AdventureWorks2012 Sales.SalesOrderDetail 97216.00 AdventureWorks2012 Sales.SalesOrderHeader 106496.00 AdventureWorks2012 Sales.SalesTerritory 106496.00 AdventureWorks2012 Sales.SalesOrderDetail 106496.00 AdventureWorks2012 Sales.SalesOrderHeader 115904.00 AdventureWorks2012 Sales.SalesTerritory 115904.00 AdventureWorks2012 Sales.SalesOrderDetail 115904.00 AdventureWorks2012 Sales.SalesOrderHeader 125856.00 AdventureWorks2012 Sales.SalesTerritory 125856.00 AdventureWorks2012 Sales.SalesOrderDetail 125856.00 AdventureWorks2012 Sales.SalesOrderHeader 136808.00 AdventureWorks2012 Sales.SalesTerritory 136808.00 AdventureWorks2012 Sales.SalesOrderDetail 136808.00 AdventureWorks2012 Sales.SalesOrderHeader 147752.00 AdventureWorks2012 Sales.SalesTerritory 147752.00 AdventureWorks2012 Sales.SalesOrderDetail 147752.00 AdventureWorks2012 Sales.SalesOrderHeader 158704.00 AdventureWorks2012 Sales.SalesTerritory 158704.00 AdventureWorks2012 Sales.SalesOrderDetail 158704.00 AdventureWorks2012 Sales.SalesOrderHeader 169656.00 AdventureWorks2012 Sales.SalesTerritory 169656.00 AdventureWorks2012 Sales.SalesOrderDetail 169656.00 AdventureWorks2012 Sales.SalesOrderHeader 180608.00 AdventureWorks2012 Sales.SalesTerritory 180608.00 AdventureWorks2012 Sales.SalesOrderDetail 180608.00 AdventureWorks2012 Sales.SalesOrderHeader 191552.00 AdventureWorks2012 Sales.SalesTerritory 191552.00 AdventureWorks2012 Sales.SalesOrderDetail 191552.00 AdventureWorks2012 Sales.SalesOrderHeader 202504.00 AdventureWorks2012 Sales.SalesTerritory 202504.00 AdventureWorks2012 Sales.SalesOrderDetail 202504.00 AdventureWorks2012 Sales.SalesOrderHeader 213456.00 AdventureWorks2012 Sales.SalesTerritory 213456.00 AdventureWorks2012 Sales.SalesOrderDetail 213456.00 AdventureWorks2012 Sales.SalesOrderHeader 224408.00 AdventureWorks2012 Sales.SalesTerritory 224408.00 AdventureWorks2012 Sales.SalesOrderDetail 224408.00 AdventureWorks2012 Sales.SalesOrderHeader 235352.00 AdventureWorks2012 Sales.SalesTerritory 235352.00 AdventureWorks2012 Sales.SalesOrderDetail 235352.00 AdventureWorks2012 Sales.SalesOrderHeader 246304.00 AdventureWorks2012 Sales.SalesTerritory 246304.00 AdventureWorks2012 Sales.SalesOrderDetail 246304.00 AdventureWorks2012 Sales.SalesOrderHeader 257264.00 AdventureWorks2012 Sales.SalesTerritory 257264.00 AdventureWorks2012 Sales.SalesOrderDetail 257264.00 AdventureWorks2012 Sales.SalesOrderHeader 268216.00 AdventureWorks2012 Sales.SalesTerritory 268216.00 AdventureWorks2012 Sales.SalesOrderDetail 268216.00 AdventureWorks2012 Sales.SalesOrderHeader 279168.00 AdventureWorks2012 Sales.SalesTerritory 279168.00 AdventureWorks2012 Sales.SalesOrderDetail 279168.00 AdventureWorks2012 Sales.SalesOrderHeader 290112.00 AdventureWorks2012 Sales.SalesTerritory 290112.00 AdventureWorks2012 Sales.SalesOrderDetail 290112.00 AdventureWorks2012 Sales.SalesOrderHeader 301056.00 AdventureWorks2012 Sales.SalesTerritory 301056.00 AdventureWorks2012 Sales.SalesOrderDetail 301056.00 AdventureWorks2012 Sales.SalesOrderHeader 312000.00 AdventureWorks2012 Sales.SalesTerritory 312000.00 AdventureWorks2012 Sales.SalesOrderDetail 312000.00 AdventureWorks2012 Sales.SalesOrderHeader 322944.00 AdventureWorks2012 Sales.SalesTerritory 322944.00 AdventureWorks2012 Sales.SalesOrderDetail 322944.00 AdventureWorks2012 Sales.SalesOrderHeader 333888.00 AdventureWorks2012 Sales.SalesTerritory 333888.00 AdventureWorks2012 Sales.SalesOrderDetail 333888.00 AdventureWorks2012 Sales.SalesOrderHeader 344832.00 AdventureWorks2012 Sales.SalesTerritory 344832.00 AdventureWorks2012 Sales.SalesOrderDetail 344832.00 AdventureWorks2012 Sales.SalesOrderHeader 355776.00 AdventureWorks2012 Sales.SalesTerritory 355776.00 AdventureWorks2012 Sales.SalesOrderDetail 355776.00 AdventureWorks2012 Sales.SalesOrderHeader 366720.00 AdventureWorks2012 Sales.SalesTerritory 366720.00 AdventureWorks2012 Sales.SalesOrderDetail 366720.00 AdventureWorks2012 Sales.SalesOrderHeader 377664.00 AdventureWorks2012 Sales.SalesTerritory 377664.00 AdventureWorks2012 Sales.SalesOrderDetail 377664.00 AdventureWorks2012 Sales.SalesOrderHeader 388608.00 AdventureWorks2012 Sales.SalesTerritory 388608.00 AdventureWorks2012 Sales.SalesOrderDetail 388608.00 AdventureWorks2012 Sales.SalesOrderHeader 399552.00 AdventureWorks2012 Sales.SalesTerritory 399552.00 AdventureWorks2012 Sales.SalesOrderDetail 399552.00 AdventureWorks2012 Sales.SalesOrderHeader 410496.00 AdventureWorks2012 Sales.SalesTerritory 410496.00 AdventureWorks2012 Sales.SalesOrderDetail 410496.00 AdventureWorks2012 Sales.SalesOrderHeader 421440.00 AdventureWorks2012 Sales.SalesTerritory 421440.00 AdventureWorks2012 Sales.SalesOrderDetail 421440.00 AdventureWorks2012 Sales.SalesOrderHeader 432384.00 AdventureWorks2012 Sales.SalesTerritory 432384.00 AdventureWorks2012 Sales.SalesOrderDetail 432384.00 AdventureWorks2012 Sales.SalesOrderHeader 443328.00 AdventureWorks2012 Sales.SalesTerritory 443328.00 AdventureWorks2012 Sales.SalesOrderDetail 443328.00 AdventureWorks2012 Sales.SalesOrderHeader 454272.00 AdventureWorks2012 Sales.SalesTerritory 454272.00 AdventureWorks2012 Sales.SalesOrderDetail 454272.00 AdventureWorks2012 Sales.SalesOrderHeader 465216.00 AdventureWorks2012 Sales.SalesTerritory 465216.00 AdventureWorks2012 Sales.SalesOrderDetail 465216.00 AdventureWorks2012 Sales.SalesOrderHeader 476160.00 AdventureWorks2012 Sales.SalesTerritory 476160.00 AdventureWorks2012 Sales.SalesOrderDetail 476160.00 AdventureWorks2012 Sales.SalesOrderHeader 487104.00 AdventureWorks2012 Sales.SalesTerritory 487104.00 AdventureWorks2012 Sales.SalesOrderDetail 487104.00 AdventureWorks2012 Sales.SalesOrderHeader 498048.00 AdventureWorks2012 Sales.SalesTerritory 498048.00 AdventureWorks2012 Sales.SalesOrderDetail 498048.00 AdventureWorks2012 Sales.SalesOrderHeader 508992.00 AdventureWorks2012 Sales.SalesTerritory 508992.00 AdventureWorks2012 Sales.SalesOrderDetail 508992.00 AdventureWorks2012 Sales.SalesOrderHeader 519936.00 AdventureWorks2012 Sales.SalesTerritory 519936.00 AdventureWorks2012 Sales.SalesOrderDetail 519936.00 AdventureWorks2012 Sales.SalesOrderHeader 530880.00 AdventureWorks2012 Sales.SalesTerritory 530880.00 AdventureWorks2012 Sales.SalesOrderDetail 530880.00 AdventureWorks2012 Sales.SalesOrderHeader 541824.00 AdventureWorks2012 Sales.SalesTerritory 541824.00 AdventureWorks2012 Sales.SalesOrderDetail 541824.00 AdventureWorks2012 Sales.SalesOrderHeader 552768.00 AdventureWorks2012 Sales.SalesTerritory 552768.00 AdventureWorks2012 Sales.SalesOrderDetail 552768.00 AdventureWorks2012 Sales.SalesOrderHeader 563712.00 AdventureWorks2012 Sales.SalesTerritory 563712.00 AdventureWorks2012 Sales.SalesOrderDetail 563712.00 AdventureWorks2012 Sales.SalesOrderHeader 574656.00 AdventureWorks2012 Sales.SalesTerritory 574656.00 AdventureWorks2012 Sales.SalesOrderDetail 574656.00 AdventureWorks2012 Sales.SalesOrderHeader 585600.00 AdventureWorks2012 Sales.SalesTerritory 585600.00 AdventureWorks2012 Sales.SalesOrderDetail 585600.00 AdventureWorks2012 Sales.SalesOrderHeader 596544.00 AdventureWorks2012 Sales.SalesTerritory 596544.00 AdventureWorks2012 Sales.SalesOrderDetail 596544.00 AdventureWorks2012 Sales.SalesOrderHeader 607488.00 AdventureWorks2012 Sales.SalesTerritory 607488.00 AdventureWorks2012 Sales.SalesOrderDetail 607488.00 AdventureWorks2012 Sales.SalesOrderHeader 618432.00 AdventureWorks2012 Sales.SalesTerritory 618432.00 AdventureWorks2012 Sales.SalesOrderDetail 618432.00 AdventureWorks2012 Sales.SalesOrderHeader 629376.00 AdventureWorks2012 Sales.SalesTerritory 629376.00 AdventureWorks2012 Sales.SalesOrderDetail 629376.00 AdventureWorks2012 Sales.SalesOrderHeader 640320.00 AdventureWorks2012 Sales.SalesTerritory 640320.00 AdventureWorks2012 Sales.SalesOrderDetail 640320.00 AdventureWorks2012 Sales.SalesOrderHeader 651264.00 AdventureWorks2012 Sales.SalesTerritory 651264.00 AdventureWorks2012 Sales.SalesOrderDetail 651264.00 AdventureWorks2012 Sales.SalesOrderHeader 662208.00 AdventureWorks2012 Sales.SalesTerritory 662208.00 AdventureWorks2012 Sales.SalesOrderDetail 662208.00 AdventureWorks2012 Sales.SalesOrderHeader 673152.00 AdventureWorks2012 Sales.SalesTerritory 673152.00 AdventureWorks2012 Sales.SalesOrderDetail 673152.00 AdventureWorks2012 Sales.SalesOrderHeader 684096.00 AdventureWorks2012 Sales.SalesTerritory 684096.00 AdventureWorks2012

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