sql 查询服务器执行的状态

select sid,       v$session.username 用户名,       last_call_et 持续时间,       status 状态,       LOCKWAIT 等待锁,       machine 用户电脑名,       logon_time 开始登入时间,       sql_text  from v$session, v$process, v$sqlarea where paddr = addr   and sql_hash_value = hash_value   and v$session.username = 'WAP'   and status = 'ACTIVE'   and v$session.username is not null order by last_call_et desc;