select
s.sid,s.serial#,
s.sql_id,
v.usn,
segment_name,
r.status,
v.rssize/1024/1024 mb
from
dba_rollback_segs r,
v$rollstat v,
v$transaction t,
v$session s
Where
r.segment_id = v.usn and
v.usn=t.xidusn and
t.addr=s.taddr
order by segment_name;
Oracle 查看占用undo大的sql语句
原文：http://www.cnblogs.com/Clark-cloud-database/p/7814280.html
