Question

我有一个产生结果的表格，如：

Code   Month    Value

733     May      520.00
733     May     2250.00
733     May      125.00

我有一个要求，我需要在上面显示如下记录：

Code    May
733      520
733     2250
733      125

我可以通过 pivot 来考虑一种方式，所以我想：

Select 
    Code,
    IsNull(January,0)[January(Actual)],          
    IsNull(February,0)[February(Actual)],              
    IsNull(March,0)[March(Actual)],              
    IsNull(April,0)[April(Actual)],              
    IsNull(May,0)[May(Actual)],              
    IsNull(June,0)[June(Actual)],              
    IsNull(July,0)[July(Actual)],              
    IsNull(August,0)[August(Actual)],              
    IsNull(September,0)[September(Actual)],              
    IsNull(October,0)[October(Actual)],              
    IsNull(November,0)[November(Actual)],              
    IsNull(December,0)[December(Actual)]
From 
    (
    Select 
         Code,
         [Month],
         Value
    From 
        #tempMonthWiseActualValue
    )s 
Pivot  
    (
         min([Value] )
         For [Month]           
        In    (January,February,March,April,May,June,July,August,September,October,November,December) 
    )as pvt
Order by Code

但是有一个限制因为我需要保留所有的值，所以这里没有聚合函数可以工作，即没有MIN，MAX，SUM等。使用Min / Max会给我125或2250的值列。

所以我的问题是：

有没有办法通过使用数据透视表找到所需的结果，还是我应该去#temp表？

Answer 1

我知道这是一个非常狭窄的解决方法。它的目的是强调将数据放在不同月份的同一行上的问题。如果你描述了ovarall任务，那么我可以建议更好的解决方案。

Select 
  Code as Code
  Value as May
from Table
where Month = 'May'

Answer 2

在我的场景中，使用Row_number（）将允许获得所需的输出，即使有多个月和一个月的值比其他值多，它也会处理。希望它可以帮助面临类似情况的人：

Select  
    Code,
    rnum,
    IsNull(January,0)[January(Value)],          
    IsNull(February,0)[February(Value)],              
    IsNull(March,0)[March(Value)],              
    IsNull(April,0)[April(Value)],              
    IsNull(May,0)[May(Value)],              
    IsNull(June,0)[June(Value)],              
    IsNull(July,0)[July(Value)],              
    IsNull(August,0)[August(Value)],              
    IsNull(September,0)[September(Value)],              
    IsNull(October,0)[October(Value)],              
    IsNull(November,0)[November(Value)],              
    IsNull(December,0)[December(Value)]

From 
    (
    Select 
         Code,
        ROW_NUMBER() Over (Order by nSRNo) [rnum],
        [Month],
        Value
    From 
        #tempMonthWiseActualValue
    )s 
Pivot 
    (
     Max([Value] )
     For [Month]           
     In (January,February,March,April,May,June,July,August,September,October,November,December) 
)as pvt

Answer 3

有两种方法可以实现这个目标

首先，使用简单的案例：）

SELECT 
Code AS Code,
CASE WHEN Month = 'January' THEN Value ELSE 0 END AS January ,
CASE WHEN Month = 'February' THEN Value ELSE 0 END AS February ,
CASE WHEN Month = 'March' THEN Value ELSE 0 END AS March ,
CASE WHEN Month = 'April' THEN Value ELSE 0 END AS April ,
CASE WHEN Month = 'May' THEN Value ELSE 0 END AS May ,
CASE WHEN Month = 'June' THEN Value ELSE 0 END AS June ,
CASE WHEN Month = 'July' THEN Value ELSE 0 END AS July ,
CASE WHEN Month = 'August' THEN Value ELSE 0 END AS August ,
CASE WHEN Month = 'September' THEN Value ELSE 0 END AS September ,
CASE WHEN Month = 'October' THEN Value ELSE 0 END AS October ,
CASE WHEN Month = 'November' THEN Value ELSE 0 END AS November, 
CASE WHEN Month = 'December' THEN Value ELSE 0 END AS December 
FROM CodePivot1

其次，使用Pivot和Rownum

SELECT Code,
ISNULL(January,0) AS January,
ISNULL(February,0) AS February,
ISNULL(March,0) AS March,
ISNULL(April,0) AS April,
ISNULL(May,0) AS May,
ISNULL(June,0) AS June,
ISNULL(July,0) AS July,
ISNULL(August,0) AS August,
ISNULL(September,0) AS September,
ISNULL(October,0) AS October,
ISNULL(November,0) AS November,
ISNULL(December,0) AS December  
FROM  
    (
    SELECT 
         Code, [Month],  Value, ROW_NUMBER() OVER (ORDER BY Code) [rnum]
    FROM 
        CodePivot1
    )s 
PIVOT 
    (
     MAX([Value])
     FOR [Month]           
     IN (January,February,March,April,May,June,July,August,September,October,November,December) 
)as p

在SQL Server中的数字字段上没有聚合的透视

3 个答案: