Question

我有一个包含两列的表interest_summary表：

int_rate号码，
total_balance号码

例如

我的查询应返回2列或10.50到10.75之类的字符串，因为它们的总数超过总数的60％

你能在Oracle中建议一个逻辑吗？

Answer 1

select 
  min(int_rate), 
  max(int_rate) 
from 
  (
    select 
      int_rate,   
      nvl(sum(total_balance) over(
        order by total_balance desc
        rows between unbounded preceding and 1 preceding
      ),0) as part_sum
    from interest_summary
  )
where 
  part_sum < (select 0.6*sum(total_balance) from interest_summary)

fiddle

Answer 2

我假设您正在根据以下算法选择行：

按total_balance（降序）
选择剩余的最高total_balance行
如果将total_balance添加到总余额的总计不到60％，请将其添加到池中并获取下一行（第2步）
如果没有将行添加到池中并返回。

已排序的运行总计看起来像这样（我会对行进行编号，以便更容易理解会发生什么）：

SQL> WITH data AS (
  2            SELECT 1 id, 10.25 interest_rate,  50 total_balance FROM DUAL
  3  UNION ALL SELECT 2 id, 10.50 interest_rate, 100 total_balance FROM DUAL
  4  UNION ALL SELECT 3 id, 10.75 interest_rate, 240 total_balance FROM DUAL
  5  UNION ALL SELECT 4 id, 11.00 interest_rate,  20 total_balance FROM DUAL
  6  )
  7  SELECT id, interest_rate,
  8         SUM(total_balance) OVER (ORDER BY total_balance DESC) running_total,
  9         SUM(total_balance) OVER (ORDER BY total_balance DESC)
 10         /
 11         SUM(total_balance) OVER () * 100 pct_running_total
 12    FROM data
 13   ORDER BY 3;

        ID INTEREST_RATE RUNNING_TOTAL PCT_RUNNING_TOTAL
---------- ------------- ------------- -----------------
         3         10,75           240  58,5365853658537
         2          10,5           340  82,9268292682927
         1         10,25           390  95,1219512195122
         4            11           410               100

因此，在此示例中，我们必须返回第3行和第2行，因为第2行是其总运行百分比超过60％的第一行：

SQL> WITH data AS (
  2            SELECT 1 id, 10.25 interest_rate,  50 total_balance FROM DUAL
  3  UNION ALL SELECT 2 id, 10.50 interest_rate, 100 total_balance FROM DUAL
  4  UNION ALL SELECT 3 id, 10.75 interest_rate, 240 total_balance FROM DUAL
  5  UNION ALL SELECT 4 id, 11.00 interest_rate,  20 total_balance FROM DUAL
  6  )
  7  SELECT ID, interest_rate
  8    FROM (SELECT ID, interest_rate,
  9                 SUM(over_limit)
 10                    OVER(ORDER BY total_balance DESC) over_limit_no
 11            FROM (SELECT id,
 12                         interest_rate,
 13                         total_balance,
 14                         CASE
 15                            WHEN SUM(total_balance)
 16                                    OVER(ORDER BY total_balance DESC)
 17                                 / SUM(total_balance) OVER() * 100 < 60 THEN
 18                             0
 19                            ELSE
 20                             1
 21                         END over_limit
 22                    FROM data
 23                   ORDER BY 3))
 24   WHERE over_limit_no <= 1;

        ID INTEREST_RATE
---------- -------------
         3         10,75
         2          10,5

如何找到销售总额超过60％的地区

2 个答案: