sql - 按oracle中的每一列排序

Question

我有一张桌子

DPN      Incidents  wk32        wk31             wk30            wk29
15326868    2.00    16,020.98   9,586.14        
13655518    2.00    15,246.40   2,619.89        
13592065    4.00    4,138.67    7,851.41    7,725.56          7,593.11
13968309    4.00    3,027.89    3,788.18    10,155.71         2,328.68
13533086    4.00    10,266.52   6,479.47    8,761.08         10,949.50
13838079    3.00    5,890.04    1,214.42                     10,445.45

如果他们输入一个 topx=2

我应该有输出

DPN # of Incidents  wk32               wk31     wk30             wk29
15326868    2.00    16,020.98       9,586.14        
13655518    1.00    15,246.40           
13592065    1.00                    7,851.41                 
13968309    1.00                              10,155.71        
13533086    2.00                              8,761.08       10,949.50      
13838079    1.00                                             10,445.45 

上面的输出是它应该每周按 desc 排序并以与上面相同的格式显示，并且还重新计算没有事件。事件是每个值存在多少列。请让我知道该怎么做。

Answer 1

这有几个部分。第一个是row_number()用来确定每周的前两名。第二个是将值限制为这两个，第三个是重新计算incidents：

select DPN,
       sum((case when wk32 is not null then 1 else 0 end) +
           (case when wk31 is not null then 1 else 0 end) +
           (case when wk30 is not null then 1 else 0 end) +
           (case when wk29 is not null then 1 else 0 end)
          ) as incidents,
       wk32, wk31, wk30, wk29
from (select DPN,
             (case when seqnum_wk32 <= 2 then wk32 end) as wk32,
             (case when seqnum_wk31 <= 2 then wk32 end) as wk31,
             (case when seqnum_wk30 <= 2 then wk32 end) as wk30,
             (case when seqnum_wk29 <= 2 then wk32 end) as wk29
      from (select t.*,
                   row_number() over (order by wk32 desc) as seqnum_wk32,
                   row_number() over (order by wk31 desc) as seqnum_wk31,
                   row_number() over (order by wk30 desc) as seqnum_wk30,
                   row_number() over (order by wk29 desc) as seqnum_wk29
           from t
          ) t
     ) t
order by wk32 desc, wk31 desc, wk30 desc, wk29 desc;