oracle 查询SQL 的执行速度

SELECT SE.SID,
       OPNAME,
       TRUNC(SOFAR / TOTALWORK * 100, 2) || '%' AS PCT_WORK,
       ELAPSED_SECONDS ELAPSED,
       ROUND(ELAPSED_SECONDS * (TOTALWORK - SOFAR) / SOFAR) REMAIN_TIME,
       SQL_TEXT
  FROM V$SESSION_LONGOPS SL, V$SQLAREA SA, V$SESSION SE
 WHERE SL.SQL_HASH_VALUE = SA.HASH_VALUE
   AND SL.SID = SE.SID
   AND SOFAR != TOTALWORK
--and SE.SID = 459
 ORDER BY START_TIME;