樞轉多個欄

Question

我在SQL Server 2008中有兩個表，一個中有每周需要的文章，另一個中我有庫存，有點像

需求：

Article                      Week                           Need

--------------------------------------------------------------------

aa                            1                                25
aa                            2                                13
aa                            4                                33
aa                            6                                21
aa                            25                               40
ab                            1                                 1
ab                            2                                 3
ab                            16                               14
ab                            50                               50

股票

  Article                       Units
---------------------------------------------------------------------------
    aa                            80    
    ab                            14
    ac                             8                

我需要顯示類似的東西：

 Article       WEEK1          WEEK2       WEEK4         WEEK6        WEEK16       WEEK25   
            needs stock   needs stock  needs stock   needs stock   needs stock  needs stock


 aa           25    80      13   55      42    22      21    20      0   -1        40  -1
 ab            1    14       3   13       0    10        0   10     14  10          0  -4   

這將在Encel中顯示，為此我使用C＃和T-SQL，我的問題是，如果使用PIVOT，我可以每周滿足需求，但我希望有需求和庫存，如果我沒有樞軸，我可以每周獲取庫存的文章，將數據保存在對象中，每周進行庫存的計算，然后格式化Excel，但是我在對象中需要一個問題，例如：

puclic class needsPerWeek
{
string Article{get;set;}
int needsWeek1{get;set;}
int stockWeek1{get;set;}
int needsWeek2{get;set;}
int stockWeek2{get;set;}
int needsWeek{get;set;}
int stockWeek4{get;set;}
int needsWeek6{get;set;}
int stockWeek6{get;set;}
int needsWeek16{get;set;}
int stockWeek16{get;set;}
int needsWeek25{get;set;}
int stockWeek25{get;set;}
int needsWeek50{get;set;}
int stockWeek50{get;set;}
....
....
}

但是我不知道我會收到多少周。

那么，我可以使用數據透視表嗎？還是可以通過其他任何方式來做到這一點？

Answer 1

只需復制並粘貼下面的代碼，然后根據需要進行一些更改。 我們只是制作動態列字符串（UnitsWeek1，UnitsWeek2，NeedsWeek1 ...等）。 並使用Pivot獲取兩個表，並通過將兩個表Pivot獲得最終表。

DECLARE @cols1 AS NVARCHAR(MAX),
   @query1  AS NVARCHAR(MAX),
   @cols2 AS NVARCHAR(MAX),
   @query2  AS NVARCHAR(MAX);

select @cols1 = STUFF((SELECT distinct ',' + QUOTENAME('NeedsWeek'+Week) 
                   from NeedsMaster FOR XML PATH(''), TYPE
           ).value('.', 'NVARCHAR(MAX)') 
       ,1,1,'')

set @query1 = 'SELECT Article, ' + @cols1 + ' from 
            (
                select Article
                       , Need
                       ,''NeedsWeek''+Week as Week 
                       from
                   NeedsMaster 
           ) x
           pivot 
           (
               min(need)
               for Week in (' + @cols1 + ')
           ) p '

select @cols2 = STUFF((SELECT distinct ',' + QUOTENAME('UnitsWeek'+n.Week) 
                   from NeedsMaster n left join StocksMaster s
on s.Article=n.Article
           FOR XML PATH(''), TYPE
           ).value('.', 'NVARCHAR(MAX)') 
       ,1,1,'')

set @query2 = 'Select * from (SELECT Article, ' + @cols2 + ' from 
            (
                select n.Article
                       , s.Units
                       ,''UnitsWeek''+n.Week as Week

                   from StocksMaster s
                   inner join NeedsMaster n
                      on s.Article=n.Article
           ) x1
           pivot 
           (
               min(Units)
               for Week in (' + @cols2 + ')
           ) p1 ) a inner join 
           (SELECT Article, ' + @cols1 + ' from 
            (
                select Article

                       , Need
                      ,''NeedsWeek''+Week as Week 
                       from
                   NeedsMaster 
           ) x2
           pivot 
           (
               min(need)
               for Week in (' + @cols1 + ')
           ) p2 ) b on a.Article=b.Article'

execute(@query2)

（@ query1只是為了更好地理解目的）。 試試看，我希望您可以根據需要進行編輯。

參考