--查询数据库的连接情况：（数据库SQL可直接执行）
SELECT [dec].client_net_address,
[des].[program_name],
[des].[host_name],
Count([dec].session_id) AS connection_count
FROM sys.dm_exec_sessions AS [des]
INNER JOIN sys.dm_exec_connections AS [dec]
ON [des].session_id = [dec].session_id
GROUP BY [dec].client_net_address,
[des].[program_name],
[des].[host_name]
ORDER BY [des].[program_name],
[dec].[client_net_address]

查询结果如下：