oracle中的查询分区

如何将query1的结果分配给query2？（结果有小数点）谢谢：oracle中的查询分区

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'

来源

2017-08-15 jansetk

不要比较字符串，使简单的'where counter_date sysdate-1和sysdate - 1/24'之间， TRUNC（sysdate - 1，'MI'）和TRUNC（sysdate - 1/24，'MI'）之间的TRUNC（counter_date，'MI'）' –

你可以简单地这样做：

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种方式）。

谨防被零除错误！

来源

2017-08-15 11:23:13

oracle中的查询分区

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