TSQL - Unpivot多列

Question

如何在“one”中取消多个列？

现在我对每一列都有一个unpivot，但是这会产生很多空行。

请看截图。

在顶部您会看到输入数据。目前，我在此代码中间表：

SELECT [ID], [RowNumber], [Year], [Sales] FROM (
     SELECT ID, RowNumber, [Sales 2013] as [2013], [Sales 2014] as [2014] 
     FROM mytable) p  UNPIVOT (
     [Sales] FOR [Year] IN ([2013], [2014]) )AS unpvt ; 

但我认为这将是更好的去底表结构，因为实际的数据包含更多的列和多年应对用。

Here's a Fiddle与样本数据。

希望你能告诉我一种方法去那里。 谢谢。

Answer 1

SELECT [ID], 
     [RowNumber], 
     [Year], 
     Sales, 
     Budget 
FROM mytable 
     CROSS APPLY (VALUES (2013, [Sales 2013], [Budget 2013]), 
          (2014, [Sales 2014], [Budget 2014])) 
        V([Year], Sales, Budget) 

SQL Fiddle

Answer 2

一种方法是unpivoting后repivot - 像这样：

select [Id], [Year], [Sales], [Budget], [Actual] from 
(SELECT [Id], 
     Left([Colhead], charindex(' ',[Colhead])-1) [Category], 
     Right([Colhead], len([Colhead])-charindex(' ',[Colhead])) [Year], 
     [Figures] 
FROM (SELECT * FROM mytable) p 
     UNPIVOT ([Figures] FOR [Colhead] IN 
       ([Sales 2013],[Sales 2014],[Budget 2013],[Budget 2014],[Actual 2013],[Actual 2014]) 
    ) 
AS unpvt) as u 
pivot 
(max([Figures]) for [Category] in ([Sales], [Budget], [Actual])) as p 

SQLFiddle here。