oracle查询链接数---sql命令

select t.OSUSER,t.STATUS,t.LOGON_TIME from v$session t

select t.OSUSER,t.STATUS,t.LOGON_TIME from v$session t where t.OSUSER='admin'

select t.OSUSER,t.STATUS,t.LOGON_TIME from v$session t where t.OSUSER='liuzhaoqing'

select t.OSUSER,t.STATUS,t.LOGON_TIME from v$session t where t.OSUSER='ymx'

select t.OSUSER,t.STATUS,t.LOGON_TIME from v$session t where t.OSUSER='DFL'