Oracle查询sql执行时间

select
DISK_READS,
FIRST_LOAD_TIME,
sql_text
from vsqlarea order by vsqlarea.FIRST_LOAD_TIME desc
;

SELECT * FROM (
SELECT PARSING_USER_ID
EXECUTIONS,
SORTS,
COMMAND_TYPE,
DISK_READS,
sql_text
FROM v$sqlarea
ORDER BY disk_reads DESC )
WHERE ROWNUM<10 ;