oracle查看执行时间长sql

1.查看发生时间的snap_id
select snap_id,dbid,instance_number,startup_time,begin_interval_time,end_interval_time from dba_hist_snapshot where begin_interval_time between to_date('20200525 08:00:00','yyyy-mm-dd hh24:mi:ss') and to_date('20200601 08:00:00','yyyy-mm-dd hh24:mi:ss') and instance_number=1 order by snap_id;


2.查看执行时间top10的sql
SELECT a.*
  FROM (  SELECT trunc(NVL ( (sqt.elap / 1000000), TO_NUMBER (NULL)),3) elap_time,
                 trunc(NVL ( (sqt.cput / 1000000), TO_NUMBER (NULL)),3)  cpu_time,
                 sqt.exec,
                 trunc(DECODE (sqt.exec,
                         0, TO_NUMBER (NULL),
                         (sqt.elap / sqt.exec / 1000000)),3)
                    avg_time,
                 trunc((  100
                  * (  sqt.elap
                     / (SELECT SUM (e.VALUE) - SUM (b.VALUE)
                          FROM DBA_HIST_SYSSTAT b, DBA_HIST_SYSSTAT e
                         WHERE     B.SNAP_ID = 42304
                               AND E.SNAP_ID = 42486
                               AND B.DBID = 3230440875
                               AND E.DBID = 3230440875
                               --AND B.INSTANCE_NUMBER = 1
                               --AND E.INSTANCE_NUMBER = 1
                               AND e.STAT_NAME = 'DB time'
                               AND b.stat_name = 'DB time'))),3)
                    norm_val,
                 (DECODE (sqt.module, NULL, NULL, 'Module: ' || sqt.module))
                    connecte_modul,
                 sqt.sql_id,
                 NVL (TO_CHAR (SUBSTR (st.sql_text, 1, 3800)),' ** SQL Text Not Available ** ')SQL_TEXT
            FROM (  SELECT sql_id,
                           MAX (module) module,
                           SUM (elapsed_time_delta) elap,
                           SUM (cpu_time_delta) cput,
                           SUM (executions_delta) exec
                      FROM dba_hist_sqlstat
                     WHERE     dbid = 3230440875
                           --AND instance_number = 1
                           AND 42304 < snap_id
                           AND snap_id <= 42486
                  GROUP BY sql_id) sqt,
                 dba_hist_sqltext st
           WHERE st.sql_id(+) = sqt.sql_id AND st.dbid(+) = 3230440875
        ORDER BY NVL (sqt.elap, -1) DESC, sqt.sql_id) a
 WHERE     (ROWNUM <= 10 OR a.norm_val > 1)