在oracle中創建指定時間範圍的記錄

用於日誌統計,要求在指定的時間範圍內每天都要統計

要求            日期,5<=T<10,10<=T<20,20<=T<30,30<=T<40,T>=40,異常總數

with a as(

   select to_date('2016-11-1','yyyy-mm-dd hh24:mi:ss') startdate,to_date('2017-01-22','yyyy-mm-dd hh24:mi:ss') enddate from dual 
  )select t.v,nvl(t1.cou,0),nvl(t2.cou,0),nvl(t3.cou,0),nvl(t4.cou,0),nvl(t5.cou,0),nvl(t6.cou,0) from ( 
    select to_char(t,'yyyy-mm-dd') v 
      from (select distinct startdate + level - 1 t
             from a
          connect by level <= enddate - startdate + 1) order by  t ) t ,
     (select count(log.timespan) cou,to_char(log.logdatetime,'yyyy-mm-dd') su from sys_runlog log where log.logtype log.timespan >= 0 and  log.timespan < 10  group by to_char(log.logdatetime,'yyyy-mm-dd')) t1 ,
     (select count(log.timespan) cou,to_char(log.logdatetime,'yyyy-mm-dd') su from sys_runlog log where log.timespan >= 10 and  log.timespan < 20  group by to_char(log.logdatetime,'yyyy-mm-dd')) t2,
     (select count(log.timespan) cou,to_char(log.logdatetime,'yyyy-mm-dd') su from sys_runlog log where log.timespan >= 20 and  log.timespan < 30  group by to_char(log.logdatetime,'yyyy-mm-dd')) t3,
     (select count(log.timespan) cou,to_char(log.logdatetime,'yyyy-mm-dd') su from sys_runlog log where log.timespan >= 30 and  log.timespan < 40  group by to_char(log.logdatetime,'yyyy-mm-dd')) t4,
     (select count(log.timespan) cou,to_char(log.logdatetime,'yyyy-mm-dd') su from sys_runlog log where log.timespan >= 40 group by to_char(log.logdatetime,'yyyy-mm-dd')) t5,
     (select count(log.timespan) cou,to_char(log.logdatetime,'yyyy-mm-dd') su from sys_runlog log where log.logtype=? group by to_char(log.logdatetime,'yyyy-mm-dd')) t6
     where t.v = t1.su(+) and t.v = t2.su(+) and t.v = t3.su(+) and t.v = t4.su(+) and t.v = t5.su(+) and t.v = t6.su(+)

     order by t.v


統計登錄日誌 要求統計每天登錄的總人數   一個人登錄一次或多次也只能算是一人

(select count(distinct t.user_account) cou,to_char(t.time,'yyyy-mm-dd') su from ops_log_login t group by to_char(t.time,'yyyy-mm-dd')) t1,


用oracle創建一個虛擬表 內容爲指定的時間範圍

with a as(

   select to_date('2016-11-1','yyyy-mm-dd hh24:mi:ss') startdate,to_date('2017-01-22','yyyy-mm-dd hh24:mi:ss') enddate from dual 
  )select t.v from ( 
    select to_char(t,'yyyy-mm-dd') v 
      from (select distinct startdate + level - 1 t
             from a
          connect by level <= enddate - startdate + 1) order by  t ) t 
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