oracle中的查詢分區

如何將query1的結果分配給query2？（結果有小數點）謝謝：oracle中的查詢分區

QUERY1：

select count(*) as aa 
    from registered_devices 
where status = 1;

QUERY2：

select sum(last_count) as current_daily 
    from statistics    
where to_char(counter_date, 'YYYYMMDDHH24') between to_char (sysdate - 1, 'YYYYMMDDHH24')      
    and to_char (sysdate - 1 /24, 'YYYYMMDDHH24') 
    and counter_type = 'WS_GET_OFFER_ACCEPT'

來源

2017-08-15 jansetk

不要比較字符串，使簡單的'where counter_date sysdate-1和sysdate - 1/24'之間， TRUNC（sysdate - 1，'MI'）和TRUNC（sysdate - 1/24，'MI'）之間的TRUNC（counter_date，'MI'）' –

你可以簡單地這樣做：

select (select count(*) as aa 
      from registered_devices 
     where status = 1) 
    /(select sum(last_count) as current_daily 
      from statistics    
      where to_char(counter_date, 'YYYYMMDDHH24') 
        between to_char (sysdate - 1, 'YYYYMMDDHH24')      
         and to_char (sysdate - 1 /24, 'YYYYMMDDHH24') 
       and counter_type = 'WS_GET_OFFER_ACCEPT') 
    from dual

（或副如果你的意思是另一種方式）。

謹防被零除錯誤！

來源

2017-08-15 11:23:13

oracle中的查詢分區

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