查看是否有锁表的sqlselect 'blocker(' || lb.sid || ':' || sb.username || ')-sql:' ||       qb.sql_text blockers,       'waiter (' || lw.sid || ':' || sw.username || ')-sql:' ||       qw.sql_text waiters  from v$lock lb, v$lock lw, v$session sb, v$session sw, v$sql qb, v$sql qw where lb.sid = sb.sid   and lw.sid = sw.sid   and sb.prev_sql_addr = qb.address   and sw.sql_address = qw.address   and lb.id1 = lw.id1   and sw.lockwait is not null   and sb.lockwait is null   and lb.block = 1;查看被锁的表select p.spid,       a.serial#,       c.object_name,       b.session_id,       b.oracle_username,       b.os_user_name  from v$process p, v$session a, v$locked_object b, all_objects c where p.addr = a.paddr   and a.process = b.process   and c.object_id = b.object_id;查看那个用户那个进程造成死锁，锁的级别select b.owner,       b.object_name,       l.session_id,       l.locked_mode from v$locked_object l,       dba_objects b查看连接的进程SELECT sid, serial#, username, osuser FROM v$session;查看是哪个session引起的select b.username, b.sid, b.serial#, logon_time  from v$locked_object a, v$session b where a.session_id = b.sid order by b.logon_time;杀掉进程--sid是上一步查询出的sid和serid            alter system kill session 'sid,serial#';