sql-server - TSQL - 取消透视多列

Question

如何取消透视“一个”中的多个列？

现在我对每一列都有一个 unpivot ，但这会创建很多空行。

请看截图。

在顶部，您可以看到输入数据。目前我在中间的桌子旁，上面有这段代码：

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 ;

但我认为进入底部表结构会更好，因为实际数据包含更多列和更多年要处理。

这是一个带有示例数据的小提琴。

希望你能告诉我一个到达那里的方法。谢谢你。

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小提琴

Answer 2

一种方法是在取消旋转后重新旋转 - 如下所示：

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在这里。