set line 199 
col username format a14 
col event format a35 
col module format a20 
col spid format a8 
col machine format a15
col B_SESS for a10 

--根据等待事件查会话
SELECT /*+rule */ sid, s.serial#, spid, event, sql_id, seconds_in_wait ws, row_wait_obj# obj, s.username, s.machine,  BLOCKING_INSTANCE||'.'||blocking_session b_sess FROM v$session s, v$process p WHERE event='&event_name' AND s.paddr = p.addr order by 6;

--根据用户查会话
SELECT /*+rule */ sid, s.serial#, spid, event, sql_id, seconds_in_wait ws, row_wait_obj# obj, s.username, s.machine,  BLOCKING_INSTANCE||'.'||blocking_session b_sess FROM v$session s, v$process p WHERE s.username='&user_name' AND s.paddr = p.addr order by 6

--根据SQL_ID查会话
SELECT /*+rule */ sid, s.serial#, spid, event, sql_id, seconds_in_wait ws, row_wait_obj# obj, s.username, s.machine,  BLOCKING_INSTANCE||'.'||blocking_session b_sess FROM v$session s, v$process p WHERE s.sql_id='&sql_id' AND s.paddr = p.addr order by 6

--根据会话ID查会话详情
SELECT s.sid, s.serial#, spid, event, sql_id, PREV_SQL_ID, seconds_in_wait ws, row_wait_obj# obj, s.username, s.machine, module,blocking_session b_sess,logon_time  FROM v$session s, v$process p WHERE sid = '&sid' AND s.paddr = p.addr;

--查询阻塞会话
select count(*),blocking_session from v$session where blocking_session is not null group by blocking_session;

--查询会话的对象信息
col OBJECT_NAME for a30
select owner,object_name,subobject_name,object_type from dba_objects where object_id=&oid;