查询 TOP 50 INSERTS,UPDATES,DELETES 的表，也就是查看系统核心表
原理：一个系统的核心表会经常insert/update/delete。
跑下面脚本一定要在收集统计信息之前。
sys.mon_mods$ 记录还未FLUSH到mon_mods_all$的信息 (注意：该表不是实时的，需要等一会儿才会记录DML数据，但是它的刷新与sys.mon_mods_all$不一样)
sys.mon_mods_all$ 是DBA_TAB_MODIFICATIONS的基表。
收集统计信息会清空上面2个表的数据。
select * from
(
select * from
(
select * from
(
select u.name owner, o.name table_name, null partition_name, null subpartition_name,
m.inserts, m.updates, m.deletes, m.timestamp,
decode(bitand(m.flags,1),1,'YES','NO') truncated,
m.drop_segments
from sys.mon_mods_all$ m, sys.obj$ o, sys.tab$ t, sys.user$ u
where o.obj# = m.obj# and o.obj# = t.obj# and o.owner# = u.user#
union all
select u.name, o.name, o.subname, null,
m.inserts, m.updates, m.deletes, m.timestamp,
decode(bitand(m.flags,1),1,'YES','NO'),
m.drop_segments
from sys.mon_mods_all$ m, sys.obj$ o, sys.user$ u
where o.owner# = u.user# and o.obj# = m.obj# and o.type#=19
union all
select u.name, o.name, o2.subname, o.subname,
m.inserts, m.updates, m.deletes, m.timestamp,
decode(bitand(m.flags,1),1,'YES','NO'),
m.drop_segments
from sys.mon_mods_all$ m, sys.obj$ o, sys.tabsubpart$ tsp, sys.obj$ o2,
sys.user$ u
where o.obj# = m.obj# and o.owner# = u.user# and
o.obj# = tsp.obj# and o2.obj# = tsp.pobj#
) where owner not like '%SYS%' and owner not like 'XDB'
union all
select * from
(
select u.name owner, o.name table_name, null partition_name, null subpartition_name,
m.inserts, m.updates, m.deletes, m.timestamp,
decode(bitand(m.flags,1),1,'YES','NO') truncated,
m.drop_segments
from sys.mon_mods$ m, sys.obj$ o, sys.tab$ t, sys.user$ u
where o.obj# = m.obj# and o.obj# = t.obj# and o.owner# = u.user#
union all
select u.name, o.name, o.subname, null,
m.inserts, m.updates, m.deletes, m.timestamp,
decode(bitand(m.flags,1),1,'YES','NO'),
m.drop_segments
from sys.mon_mods$ m, sys.obj$ o, sys.user$ u
where o.owner# = u.user# and o.obj# = m.obj# and o.type#=19
union all
select u.name, o.name, o2.subname, o.subname,
m.inserts, m.updates, m.deletes, m.timestamp,
decode(bitand(m.flags,1),1,'YES','NO'),
m.drop_segments
from sys.mon_mods$ m, sys.obj$ o, sys.tabsubpart$ tsp, sys.obj$ o2,
sys.user$ u
where o.obj# = m.obj# and o.owner# = u.user# and
o.obj# = tsp.obj# and o2.obj# = tsp.pobj#
) where owner not like '%SYS%' and owner not like '%XDB%'
) order by inserts desc
) where rownum<=50;