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在SQL SERVER中如何通过SQL语句获取服务器硬件和系统信息呢？下面介绍一下如何通过SQL语句获取处理器(CPU)、内存（Memory）、磁盘（Disk）以及操作系统相关信息。如有不足和遗漏，敬请补充。谢谢！
一：查看数据库服务器CPU的信息
—SQL 1:获取数据库服务器的CPU型号
EXEC xp_instance_regread
'HKEY_LOCAL_MACHINE',
'HARDWARE\DESCRIPTION\System\CentralProcessor\0',
'ProcessorNameString';
—SQL 2:获取数据库服务器CPU核数等信息(只适用于SQL 2005以及以上版本数据库)
/*************************************************************************************
–cpu_count :指定系统中的逻辑 CPU 数
–hyperthread_ratio :指定一个物理处理器包公开的逻辑内核数与物理内核数的比.虚拟机
— 中可以表示每个虚拟插槽的核数。虚拟中[Physical CPU Count]其实
— 表示虚拟插槽数
*************************************************************************************/
SELECT s.cpu_count AS [Loggic CPU Count]
,s.hyperthread_ratio AS [Hyperthread Ratio]
,s.cpu_count/s.hyperthread_ratio AS [Physical CPU Count]
FROM sys.dm_os_sys_info s OPTION (RECOMPILE);
—SQL 3:获取数据库服务器CPU核数(适用于所有版本)
CREATE TABLE #TempTable
(
[Index] VARCHAR(2000) ,
[Name] VARCHAR(2000) ,
[Internal_Value] VARCHAR(2000) ,
[Character_Value] VARCHAR(2000)
);
INSERT INTO #TempTable
EXEC xp_msver;
SELECT Internal_Value AS VirtualCPUCount
FROM #TempTable
WHERE Name = 'ProcessorCount';
DROP TABLE #TempTable;
GO
—SQL 4：在老外博客中看到一个计算CPU相关信息的SQL，不过虚拟机计算有点小问题，我修改了一下。
DECLARE @xp_msver TABLE (
[idx] [int] NULL
,[c_name] [varchar](100) NULL
,[int_val] [float] NULL
,[c_val] [varchar](128) NULL
)
INSERT INTO @xp_msver
EXEC ('[master]..[xp_msver]');;
WITH [ProcessorInfo]
AS (
SELECT ([cpu_count] / [hyperthread_ratio]) AS [number_of_physical_cpus]
,CASE
WHEN hyperthread_ratio = cpu_count
THEN cpu_count
ELSE (([cpu_count] – [hyperthread_ratio]) / ([cpu_count] / [hyperthread_ratio]))
END AS [number_of_cores_per_cpu]
,CASE
WHEN hyperthread_ratio = cpu_count
THEN cpu_count
ELSE ([cpu_count] / [hyperthread_ratio]) * (([cpu_count] – [hyperthread_ratio]) / ([cpu_count] / [hyperthread_ratio]))
END AS [total_number_of_cores]
,[cpu_count] AS [number_of_virtual_cpus]
,(
SELECT [c_val]
FROM @xp_msver
WHERE [c_name] = 'Platform'
) AS [cpu_category]
FROM [sys].[dm_os_sys_info]
)
SELECT [number_of_physical_cpus]
,[number_of_cores_per_cpu]
,[total_number_of_cores]
,[number_of_virtual_cpus]
,LTRIM(RIGHT([cpu_category], CHARINDEX('x', [cpu_category]) – 1)) AS [cpu_category]
FROM [ProcessorInfo]
—查看虚拟机CPU信息
DECLARE @xp_msver TABLE (
[idx] [int] NULL
,[c_name] [varchar](100) NULL
,[int_val] [float] NULL
,[c_val] [varchar](128) NULL
)
INSERT INTO @xp_msver
EXEC ('[master]..[xp_msver]');;
WITH [ProcessorInfo]
AS (
SELECT ([cpu_count] / [hyperthread_ratio]) AS [number_of_physical_cpus]
,[hyperthread_ratio] AS [number_of_cores_per_cpu]
,[cpu_count] AS [total_number_of_cores]
,[cpu_count] AS [number_of_virtual_cpus]
,(
SELECT [c_val]
FROM @xp_msver
WHERE [c_name] = 'Platform'
) AS [cpu_category]
FROM [sys].[dm_os_sys_info]
)
SELECT [number_of_physical_cpus]
,[number_of_cores_per_cpu]
,[total_number_of_cores]
,[number_of_virtual_cpus]
,LTRIM(RIGHT([cpu_category], CHARINDEX('x', [cpu_category]) – 1)) AS [cpu_category]
FROM [ProcessorInfo]
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