试图在每1分钟后完成一项工作，但它不起作用？

SQL> create table log1 (ts timestamp)
  2  /

Table created.

SQL> create or replace procedure printe as
  2  begin
  3      insert into log1 values (systimestamp);
  4      commit;
  5  end;
  6  /

Procedure created.

SQL>

SQL> var job_no number
SQL> BEGIN
   2     DBMS_JOB.SUBMIT
   3      (
   4      job =>:job_no,
   5      WHAT=>'printe;',--Procedure
   6      next_date=>sysdate+1/24*60,
   7    interval=>'sysdate+1/24*60'
   8    );
   9    commit;
  10  END;
  11  /

 PL/SQL procedure successfully completed.

 SQL> print job_no

     JOB_NO
 ----------
         71

 SQL>

SQL> BEGIN
  2     DBMS_JOB.SUBMIT
  3      (
  4      job =>:job_no,
  5      WHAT=>'printe;',--Procedure
  6      next_date=>sysdate+1/(24*60),
  7    interval=>'sysdate+1/(24*60)'
  8    );
  9    commit;
 10  END;
 11  /

PL/SQL procedure successfully completed.

SQL> print job_no

    JOB_NO
----------
        72

SQL>

SQL>    select job, what, last_date, next_date, interval
  2  from user_jobs
  3  where job in (71,72)
  4  /

   JOB WHAT         LAST_DATE            NEXT_DATE            INTERVAL
------ ------------ -------------------- -------------------- -----------------
    71 printe;                           05-MAY-2010 17:35:34 sysdate+1/24*60
    72 printe;      03-MAY-2010 05:44:42 03-MAY-2010 05:45:34 sysdate+1/(24*60)

SQL>

SQL> select * from log1
  2  /

TS
-------------------------------------------------------------------
03-MAY-10 05:43:39.250000
03-MAY-10 05:44:42.296000

SQL>

SQL> select value
  2  from v$parameter
  3  where name='job_queue_processes'
  4  /

VALUE
-------------------------
1000

SQL>

background_dump_dest