Question

我的表格如下：

Cell   Date      Hour    Minute    Counter   Value
AB1    20141008  14      15        C1        40
AB1    20141008  14      15        C2        15
AB1    20141008  14      30        C1        30
AB1    20141008  14      30        C2        13

我需要计算公式PERCENT，如果数据是水平的，C1，C2是列，则看起来像这样：

SELECT SUM(C2)/SUM(C1) as 'PERCENT'
FROM [Table]
group by Cell, Date, Hour

我正在考虑使用OVER Clause，但我不确定如何在这里实现它。

在下面的情况中，结果将是：

Cell   Date      Hour    PERCENT
AB1    20141008  14      0.40   (Total of C2 = 28 / Total of C1 = 70)

感谢。

Answer 1

如果数据是水平的，C1，C2是列

您可以将数据PIVOT来实现：

SELECT 
  Cell, Date, Hour, 
  SUM([C2])*100/SUM([C1]) AS [%],
  SUM([C2])/CAST(SUM([C1]) AS DECIMAL(10,5)) AS [Percent]
FROM TABLE1
PIVOT (SUM(value) FOR Counter in ([C1],[C2]) ) AS pvt
GROUP BY Cell, Date, Hour

Sample SQL Fiddle

输出：

| CELL |     DATE | HOUR |  % | PERCENT |
|------|----------|------|----|---------|
|  AB1 | 20141008 |   14 | 40 |     0.4 |

Answer 2

你这样做：

SELECT Cell, Date, Hour,
   SUM(CASE WHEN Counter = 'C2' THEN Value ELSE 0 END) / 
   SUM(CASE WHEN Counter = 'C1' THEN Value ELSE 0 END) AS Percent
FROM [table]
group by Cell, Date, Hour

Answer 3

使用CASE并尝试此

SELECT Cell,
       Date,
       Hour,
       SUM(CASE WHEN Counter = 'C1' THEN Value
           ELSE 0
           END )/
       SUM(CASE WHEN Counter = 'C2' THEN Value
           ELSE 0
           END) AS 'PERCENT'
FROM Table
GROUP BY Cell, Date, Hour

将用于分部的总和的垂直数据分组？

3 个答案: