监控目前所有连接SQL SERVER的用户信息

if object_id('p_getlinkinfo','P')is not null drop proc p_getlinkinfo
go
create proc p_getlinkinfo 
@dbname sysname=null, --要查詢的數據庫名,默認表示所有 
@includeip bit=0 --是否顯示IP信息 
as 
begin
declare @dbid int 
set @dbid=db_id(@dbname)
if object_id('tempdb..#tb')is not null drop table #tb
if object_id('tempdb..#ip')is not null drop table #ip 
create table #tb
(id int identity(1,1),
dbname sysname,
hostname nchar(128),
loginname nchar(128),
net_address nchar(12),
net_ip nvarchar(15),
prog_name nchar(128)) 
insert into #tb(hostname,dbname,net_address,loginname,prog_name) 
select distinct hostname,
db_name(dbid),
net_address,
loginame,
program_name
from master..sysprocesses 
where hostname!=''and(@dbid is null or dbid=@dbid) 
if @includeip=0 goto lb_show --不顯示IP 
declare @sql varchar(500),@hostname nchar(128),@id int 
create table #ip(hostname nchar(128),a varchar(200)) 
declare tb cursor local for select distinct hostname from #tb 
open tb 
fetch next from tb into @hostname 
while @@fetch_status=0 
begin 
set @sql='ping '+@hostname+' -a -n 1 -l 1' 
insert #ip(a) exec master..xp_cmdshell @sql 
update #ip set hostname=@hostname where hostname is null 
fetch next from tb into @hostname 
end 
update #tb set net_ip=left(a,patindex('%:%',a)-1) 
from #tb a inner join 
(select hostname,a=substring(a,patindex('Ping statistics for %:%',a)+20,20) 
from #ip 
where a like'Ping statistics for %:%')b
on a.hostname=b.hostname 
lb_show: 
select id,
dbname,
hostname,
loginname,
net_address,
net_ip,
prog_name 
from #tb 
end 
go 
exec p_getlinkinfo @dbname='master',@includeip=1

　　消息15281，级别16，状态1，过程xp_cmdshell，第1 行

　　SQL Server 阻止了对组件'xp_cmdshell' 的过程'sys.xp_cmdshell' 的访问，因为此组件已作为此服务器安全配置的一部分而被关闭。系统管理员可以通过使用sp_confi　　gure 启用'xp_cmdshell'。有关启用'xp_cmdshell' 的详细信息，请参阅SQL Server 联机丛书中的"外围应用配置器"。

SELECT * FROM sys.configurations
ORDER BY name ;


sp_configure 'show advanced options', 1;
go
reconfigure;
go

sp_configure 'xp_cmdshell', 1;
go
reconfigure;
go