select *
from (select sa.SQL_TEXT,
sa.SQL_FULLTEXT,
sa.EXECUTIONS "執行次數",
round(sa.ELAPSED_TIME / 1000000, 2) "總執行時間",
round(sa.ELAPSED_TIME / 1000000 / sa.EXECUTIONS, 2) "平均執行時間",
sa.COMMAND_TYPE,
sa.PARSING_USER_ID "使用者ID",
u.username "使用者名稱",
sa.HASH_VALUE
from v$sqlarea sa
left join all_users u
on sa.PARSING_USER_ID = u.user_id
where sa.EXECUTIONS > 0
order by (sa.ELAPSED_TIME / sa.EXECUTIONS) desc)
where rownum <= 50;

select *
from (select s.SQL_TEXT,
s.EXECUTIONS "執行次數",
s.PARSING_USER_ID "使用者名稱",
rank() over(order by EXECUTIONS desc) EXEC_RANK
from v$sql s
left join all_users u
on u.USER_ID = s.PARSING_USER_ID) t
where exec_rank <= 100;