Question

我有一个数据表，请参见http://sqlfiddle.com/#!4/cf72da/5 使用枢轴语句，我可以按标题细分计数

select division, status, 
       sum(case when title = 'worker' then 1 else 0 end) as workerCount,
       (sum(case when title = 'worker' then 1 else 0 end) /
        sum(sum(case when title = 'worker' then 1 else 0 end)) over ()
       )*100 as workerPercent
from ta
group by status, division
order by division, status

所以结果看起来像这样：

DIVISION  STATUS    WORKERCOUNT  WORKERPERCENT
11        ready     3            30
11        started   3            30
12        finished  4            40
12        ready     0            0
12        started   0            0

例如，我实际上需要将百分比除以除法

DIVISION  STATUS    WORKERCOUNT  WORKERPERCENT
11        ready     3            50
11        started   3            50
12        finished  4            100
12        ready     0            0
12        started   0            0

有什么想法可以用SQL完成吗？

Answer 1

使用以下查询：

select division, status, 
       sum(case when title = 'worker' then 1 else 0 end) as workerCount,
       (sum(case when title = 'worker' then 1 else 0 end) /
        sum(sum(case when title = 'worker' then 1 else 0 end)) over (PARTITION BY division)
       )*100 as workerPercent
from ta
group by status, division
order by division, status

Answer 2

您缺少分析子句：

state = state % 3 + 1

Answer 3

您非常接近预期的结果。

您只需要在partition by中添加analytical function子句，如下所示：

SQL> SELECT
  2      DIVISION,
  3      STATUS,
  4      SUM(CASE WHEN TITLE = 'worker' THEN 1 ELSE 0 END) AS WORKERCOUNT,
  5      ( SUM(CASE WHEN TITLE = 'worker' THEN 1 ELSE 0 END) /
  6              SUM(SUM(CASE WHEN TITLE = 'worker' THEN 1 ELSE 0 END))
  7                  OVER( PARTITION BY DIVISION )  -- Changes here
  8      ) * 100 AS WORKERPERCENT
  9  FROM TA
 10  GROUP BY STATUS, DIVISION
 11  ORDER BY DIVISION, STATUS;

  DIVISION STATUS               WORKERCOUNT WORKERPERCENT
---------- -------------------- ----------- -------------
        11 ready                          3            50
        11 started                        3            50
        12 finished                       4           100
        12 ready                          0             0
        12 started                        0             0

SQL>

SQL Fiddle demo

干杯！

Answer 4

正如其他张贴者所指出的那样，您可以（并且应该）使用解析函数来解决此类问题。

专门针对您的用例，提供了RATIO_TO_REPORT函数-比您尝试和在几个答案中“手动”计算事物要好得多。

请注意我所做的另一项更改-当“ worker”和1“ 0”等于0时，总和为1。在这种情况下，COUNT比SUM更清晰。

select division, status, 
       count(case when title = 'worker' then 1 end) as workerCount,
       ratio_to_report(count(case when title = 'worker' then 1 end))
           over (partition by division)*100 as workerPercent
from  ta
group by status, division
order by division, status;

感谢您发布测试数据和您的尝试-这非常有帮助！

如何计算条件聚集百分比

4 个答案: