T-SQL code to get the active Connections for each Database.

--Method 1

 SELECT 

    DB_NAME(dbid) as DBName, 

    COUNT(dbid) as NoOfConnections,

    loginame as LoginName

FROM

    sys.sysprocesses

WHERE 

    dbid > 0

GROUP BY 

    dbid, loginame

--Method 2

EXEC sp_who2

--Method 3

SELECT  spid,

        sp.[status],

        loginame [Login],

        hostname, 

        blocked BlkBy,

        sd.name DBName, 

        cmd Command,

        cpu CPUTime,

        physical_io DiskIO,

        last_batch LastBatch,

        [program_name] ProgramName   

FROM master.dbo.sysprocesses sp 

JOIN master.dbo.sysdatabases sd ON sp.dbid = sd.dbid

ORDER BY DBName,spid

Get SQL Server Physical Cores, Physical and Virtual CPUs, and Processor type information using Transact-SQL (T-SQL) scrip

• Total number of physical CPUs
• Total number of physical cores per CPUs
• Total number of physical cores
• Total number of virtual CPUs
• Processor type (x86 or x64)

As a result of this question, I wrote the following script using sys.dm_os_sys_info and xp_msver, which returns the required information:

exec xp_msver 'ProcessorCount'

Query Starts Here

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37

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]

The code of this script is tested on SQL Server 2005 and above versions.

Reference: https://basitaalishan.com/2014/01/22/get-sql-server-physical-cores-physical-and-virtual-cpus-and-processor-type-information-using-t-sql-script/