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begin
  sys.dbms_job.submit(job => :job,
                      what => 'check_err;',
                      next_date => trunc(sysdate)+23/24,
                      interval => 'trunc(next_day(sysdate,''ÐÇÆÚÎå''))+23/24');
  commit;
end;
   
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1/24    һСʱ£»
1/1440    Ò»·Ö£»
1/3600   Ò»Ã룻


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